Hi Fanthatspark,
We can pray for the "Sins of The Fathers" and for all of the Holy Souls in Purgatory, back to Adam and Eve - however - the remainder needs to be handed over to Jesus/God/The Holy Spirit for reasons within God's Holy Will.
Why would God The Most High have brought down Jesus Christ our Saviour to suffer the worst kinds of sufferings in order for people to be forgiven their sins through Jesus' Divine Mercy (for those of whom repent), to teach people to repent their sins turning to Jesus/God, and of course to "fulfil God The Most High's Holy Decrees and Holy Prophesies.
"All things visible and 'invisible'.
As God The Most High made clear to Esdra/Ezra, the human mind/being knows not what God our Heavenly Father knows and Decrees.
We can forgive the sinner yet not forgive the "sins" of which are satans and its domain, its evil legions, demons and evil spirits wandering through the earth to destroy and attempt to claim souls of which pass over to meet God in His judgement. As Christians we know this to be a fact.
satan is more than ego, pride, vanity, lust.
satan is the father of all lies, an entity/evil spirit, a murderous spirit and the opposite of God in His Love.
satan 'caused' Adam and Eve to sin ie to disobey God's Commandments and teachings of which 'caused' Jesus to suffer His agonies, Sorrows, Torments and Crucifixion.
I personally am not going to pray for satan at any stage now or eternally however I pray special prayers that Jesus gave to.
God knows satan's will and satan rejected God and His Holy Will right through to date and therefore God does not give satan mercy.
The creature dwells in Hell with no return.
satan's evil spirits, legions and demons are wandering around here tempting people in the committal of sins - the best we can do is Consecrate all hearts souls minds and bodies to Jesus Christ our Saviour's Sacred Heart and to The Blessed Virgin Mary Mother of God's Immaculate Heart for Jesus/God to work through people's hearts, souls and minds.
God in His Holy Will, uses satan for 'some' specific tasks in relation to the benefit of souls eternally, however, we need to realise the fact that satan has rejected God and His forgiveness, causing all of the destruction of God's earth, many of His Children/people of whom God created in His Image, caused paedophilia, murders, wars, rapes, deceit, larceny, theft, all of the Seven deathly sins, right down to the lesser evils.
Nevertheless, I understand where you are coming from with the question Fanthatspark.
Satan does not want forgiveness from God; because satan rejected God The Most High.
Satan dwells within Hell and there is no turning back to God from Hell. Hell is for Eternity until Jesus Christ our Saviour appears here on earth and those in Jesus/Gods Holy Will, of whom dwell in Hell, and have not turned to Jesus Christ our Saviour during their soul journeys will in His Holy Will be destroyed eternally and that includes satan of course and its evil legions, demons/entities and evil spirits.
We are taught this in God The Most High's Old Testament by God and taught this fact by Jesus in His New Testament within Revelations with all things coming to pass and fulfilled within God's Holy Prophesies.
Satan recruits its evil spirits of whom wander through the world for the ruin of souls.
During the last days of the battle of Armegeddon which occurs soon, satan will pursue The Blessed Virgin Mary Mother of God (and the Church) and every other fact contained within God's Holy Decrees and Prophesies will be fulfilled.
Praying from our hearts for all souls here to be converted to Jesus/God is urgent and essential and in particular for all of our loved ones, families, friends, colleagues and their families too.
"Ask and ye shall receive". Trusting in Jesus Christ our Saviour, praying to Jesus and meditating on Jesus' bitter Passion, His Sorrowful Stations of His Cross in order for Jesus to open the heart wide open to Him, and to "Receive" Jesus speaking to our hearts (through the focussing on Jesus and His bitter Passion regularly).
Jesus said in His Divine Mercy holy Messages:
"Know this, My Daughter, that the prayer most pleasing to Me, is the Prayer for the 'conversion of sinners'. This Prayer is always heard and answered".
Jesus gave His Divine Mercy Chaplet to mankind to pray for the conversion of sinners. This way, Jesus is able to more powerfully through people here on earth, convert many more hearts and souls to Him more quickly. If people are unable to pray this Chaplet as a result of religious beliefs and their Faiths, I understand, however, if people could pray "The Our Fathers", the Paternoster or original Psalter with 150 x The Our Father's - for the conversion of sinners to Jesus and The Blessed Virgin Mary our Heavenly Mother - one not only has their prayers heard and answered by Jesus/God in His Holy Will, one is indeed Blessed within their souls "eternally" because Jesus and The Blessed Virgin Mary stated about The Holy Rosary and Psalter to Saint Dominic when appearing to Saint Dominic throughout his life and to the other Saints:
"Dear Dominic, do you know which Weapon The Blessed Trinity wishes to use to reform the World?"
"I want you to know that in this warfare, the battering Ram has always been the Angelic Psalter which is the foundation stone of The New Testament. Therefore, if you want to reach these hardened souls and win them over to God, preach My Psalter".
Jesus said to Saint Dominic and Blessed Alan De La Roche:
Blessed Alan began this great work in 1460 after a special warning from Our Lord, Who wished to spur him on to preach the Holy Rosary, spoke to him in the Sacred Host:
Jesus said:
"How can you crucify Me again so soon?" Jesus said. "What did You say, Lord?", asked Blessed Alan, horrified. "You crucified Me once before by your sins," answered Jesus, "and I would willingly be crucified again rather than have My Father offended by the sins you used to commit. You are crucifying Me again now because you have all the learning and understanding that you need to preach My Mother's Rosary, and you are not doing so. If you only did this you could teach many souls that right path and lead them away from sin - but you are not doing it and so you yourself are guilty of the sins that they commit."
This terrible reproach made Blessed Alan solemnly resolve to preach the Rosary unceasingly.
Our Lady too spoke to him one day to inspire him to preach the Holy Rosary more and more:
"You were a great sinner in your youth," she said, "but I obtained the grace of your conversion from my Son. Had such a thing been possible I would have liked to have gone through all kinds of suffering to save you because converted sinners are a glory to me. And I would have done this also to make you worthy of preaching my Rosary far and wide."
Saint Dominic appeared to Blessed Alan as well and told him of the great results of his ministry: he had preached the Holy Rosary unceasingly, his sermons had borne great fruit and many people had been converted during his missions. He said to Blessed Alan:
"See the wonderful results I have had through preaching the Holy Rosary! You and all those who love Our Lady ought to do the same so that, by means of this holy practice of the Rosary, you may draw all people to the real science of the virtues."
"All priests say a Hail Mary with the faithful before preaching, to ask for God's grace. They do this because of a revelation that Saint Dominic had from Our Lady. 'My son,' she said one day 'do not be surprised that your sermons fail to bear the results you had hoped for. You are trying to cultivate a piece of ground which has not had any rain. Now when Almighty God planned to renew the face of the earth He started by sending down rain from heaven - and this was the Angelic Salutation. In this way God made over the world.
'So when you give a sermon, urge people to say my Rosary, and in this way your words will bear much fruit for souls.'
Saint Louis De Montfort's book: The Secret of The Rosary with Saint Dominic, Blessed Alan De la Roche and other Saints' testimonies of Jesus and our Blessed Virgin Mary appearing to these priests during 1214, 1260 and other years.
www.rosary-center.org/secret.htm
Therefore, if we as Christians wish to see all evil eradicated and all souls saved by Jesus, we must pray from our hearts in complete trust in Jesus for these things to occur.
Jesus/God/The Holy Spirit within God's Holy Prophesies to be fulfilled are going into battle with satan and all of its evil when Jesus appears here on earth soon - with all of God's Holy Decrees and more contained within His Revelations occurring - sooner than we all think.
Jesus gave one of His 600 pages of His Divine Mercy Chaplet and Holy messages to mankind through Saint Faustina about the last days here on earth 'After' Jesus had delivered His Divine Mercy to mankind, of which was done over 40 years ago to Saint Faustina, and that He/Jesus would be appearing on Earth shortly thereafter of which directly reflects all of God The Most High's and Jesus Christ our Saviour's and His Disciples Revelations (600 pages of the Diaries recorded by Saint Sister Faustina).
holyspiritinteractive.net/features/divinemercy
divinemercy.com
(There are many links to read Jesus' Holy messages to mankind through Saint Faustina).
"Write this down, that before My Coming as Judge, I shall come as The King of Mercy. Before the Coming of that day of Justice, there will be a sign in The Heavens. All light will be extinguished in heaven and earth. There will appear in the sky the Sign of The Cross. From each of the Wounds on My Hands and Feet will shine forth a light that will for a brief time brighten the earth. This will be a short time before the last day".
The most powerful weapon against satan is "The Holy Rosary" as Jesus and our Blessed Virgin Mary Mother of God stated to Saint Dominic a priest of whom Jesus often appeared delivering God The Most High's Holy Rosary. Every negative comment about the Blessed Virgin Mary's Holy Rosary from people is through and by satan. Because, as Jesus and our Lady Mary pointed out to Saint Dominic and Blessed Alan De La Roche, the Holy Rosary is satans worst enemy, the most powerful (by God and The Blessed Virgin Mary) delivered to people here of which Jesus and The Blessed Virgin Mary hear and answer every Holy Rosary in God's Holy Will, and because people are focussing on Jesus Christ our Saviour Himself, His Holy Cross, His Agony in the Garden of Gethsemane suffered terribly, His Sorrowful Stations of His Cross and His Crucifixion, Resurrection and Ascension into Heaven conquering satan in order for souls to be taken into Jesus' Divine Mercy, to "Receive" Jesus' Divine Mercy, when souls are crossing over to Jesus and God The Most High with The Holy Spirit, at which time, satan is there with its evil legions, demons and evil spirits, trying to grab and claim souls in particular non-believers and believers of whom have not turned to Jesus in heartfelt genuine remorse and repentance of sins during our lives.
That is the reality!
There is no use sugar coating the fact most sadly.
Forgiving satan himself are not Jesus/God/The Holy Spirit's Commandments nor Teachings.
However, I pray Jesus/God/The Holy Spirit for satan to leave all souls/peoples hearts minds souls and bodies here on earth regularly through Jesus' Divine Mercy Chaplet at 3pm and The Holy Rosary. I then Consecrate all hearts souls minds and bodies here on earth to Jesus' Sacred Heart and to our Blessed Virgin Mary Mother of God's Holy Immaculate Heart now and forever...for everything is possible for us to pray from our hearts for Jesus/God/The Holy Spirit to answer in His Holy Will!
For the sick and dying to be taken into Jesus' Abyss of Divine Mercy at the hour of their deaths now and forever.
For all of the Holy Souls in Purgatory with alms of the spirit offered up including sacrifices to Jesus/God/The Holy Spirit to empty Holy Purgatory through set Prayers that Jesus has given His priests/saints personally.
Love the sinner and hate the sin of which is satan's domain.
Consecrating one's heart to Jesus Christ our Saviour's "Sacred Heart" and Consecrating one's heart to The Blessed Virgin Mary Mother of God's heart after Baptism in The Holy Spirit shows Jesus from our heart that we are His (among other reasons) and allows Jesus/God/The Holy Spirit to flow His Loving Holy Wisdom, Guidance and Enlightenment through each of us while blocking satan just that little bit more btw.
Love and kindest wishes your Sister in Jesus Christ our Saviour