There is alot of power in the body and blood of Jesus Christ when you take communion after confess to a priest.. for those churches that still have the blessed sacraments..
"
4. Planting suspicions:
The devil plants suspicions in every field, because a suspicious
person is usually weak and the devil can conquer him.
For example, the devil plants doubts in respect of
repentance; either about the possibility of repentance or its
acceptance by God.
He suggests to the person that it is not easy for him to get rid of
such sins which have become a part of his character or one of
his habits or have become so loved by him that he can never
dispense with them. Filling that person with doubts concerning
his ability, the devil conceals completely God's help or makes
him doubt it as David the prophet
says "LORD, how they have
increased who trouble me! Many are they who rise up against
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me. Many are they who say of me, "There is no help for him in
God..." (Ps 3:2).
But, if the person insists on repentance, the devil makes him
doubt God's acceptance of his repentance, either because it
came after due time or because it is not true or because his sins
are so dreadful that they cannot be forgiven easily but need
punishment beyond his endurance!
The only objective of the devil is to throw the repentant
into despair.
This would make him lose heart and continue in sin.
The devil may also make him doubt God's mercy, giving him
countless verses about God's justice and punishments; and
perhaps the punishments are for sins far lighter than his.
The devil's suspicions may enter into the personal life also."
From Diabolical Wars
http://tasbeha.org/content/hh_books/Diabwars/index.html
Also
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11. Facing the sin with the commandment:
Learn by heart a number of verses against the sins which
fight you.
For example when the devil fights you with anger, say to him,
"for the wrath of man does not produce the righteousness of
God." (James 1:20); or repeat the words of one of the saints,
"though the irritable person raises the dead, he is not accepted
by God or by anyone."
If the devil fights you with an evil look, put before him the
words of the Lord,
"Whoever looks at a woman to lust for her
has already committed adultery with her in his heart." (Matt
5:28).
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If he fights you with adultery, remember the words of the
apostle,
"Or do you not know that your body is the temple of
the Holy Spirit " (1 Cor 6:19).
"Do you not know that your
bodies are members of Christ? Shall I then take the members of
Christ and make them members of a harlot? Certainly not!"
(1 Cor 6:15).
If the devil fights you with the faults of the tongue, put before
you the verses of the Holy Bible,
"In the multitude of words sin
is not lacking." (Prov 10:19).
"... Let every man be swift to
hear, slow to speak, slow to wrath;" (James 1:19); and also
say,
"Set a guard, O LORD, over my mouth; Keep watch over
the door of my lips." (Ps 141:3).
If the devil fights you with the love of the present world, with
its temptations, face him with the words of the Holy Bible,
"The
friendship with the world is enmity with God." (James 4:4), and,
"Do not love the world or the things in the world. If anyone
loves the world, the love of the Father is not in him." (1 John
2:15),
"And the world is passing away, and the lust of it."
(1 John 2:17).
Remember also what is stated in Ecclesiastes in this respect, in
particular the statement,
"Vanity of vanities... all is vanity and
grasping for the wind and there was no profit under the sun."
(Eccl 1:2, 14, 2:11).
If the devil fights you with pride, remember the words of the
Holy Bible,
"Pride goes before destruction, And a haughty
spirit before a fall." (Prov 16:18), and,
"God resists the proud,
But gives grace to the humble." (James 4:6), (1 Pet 5:5). "
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