Marvin,
Both God The Most High and Jesus Christ our Saviour have made it quite clear within His Old Testament and New Testament that mankind were to always be guided by His Roman Catholic Church and His priests in order to receive 'all' of His Blessed Sacraments of Love (Jesus makes reference to His Blessed Sacraments) within His Old Testament and New Testament.
Receiving "all" of God/The Holy Spirit's Blessed Sacraments of Love including His Holy Eucharist from our hearts not just from our minds - this includes Baptism of The Holy Spirit, Holy Communion, Confirmation (a deepening and renewal of receiving the 7 Gifts of The Holy Spirit of which are received within the Catholic Church), the renewal in Church annually of Confirming our Love and Faith in Jesus/God/The Holy Spirit, Reconciliation (Confession and receiving Jesus/God/The Holy Spirit's forgiveness of sins); all within His Catholic Church.
Some of these Blessed Holy Sacraments of Love available to all of Jesus/God's Children are only available through Jesus Christ our Saviour's Catholic Church.
From the very beginning when God The Most High appeared and spoke to His Apostles BC, God The Most High had appointed His "priests" while providing His Holy Covenant of which all teachings (in God's Holy Will) are Catholic teachings. Priests, The Holy Tabernacle, His Blessed Sacrament, His Holy Altars, repentance of sins to God to be done prior to receiving God/The Holy Spirit's Blessed Holy Eucharist/Sacraments - all of God's Holy teachings BC for mankind to follow are Catholic teachings from His priests BC, during Jesus Christ our Saviour's birth, life and Teachings and AD; many of Jesus/God/The Holy Spirit's teachings not practiced by other faiths within their Churches.
The Lord has sworn and will not relent, 'You are a priest forever according to the order of Melchizedek.' " (Psalm 110:1-4)
Melchizedek was a High Priest of God The Most High's - appointed by God The Most High:
"And Melchizedek king of Salem brought out bread and wine: and he was [is] the priest of the most high God. And he blessed him, and said, "Blessed be Abram to the most high God, possessor of heaven and earth, And blessed be the most high God, which hath delivered thine enemies into thy hand". And he gave him tithe from all.
Genesis 14:18-20
"For this Melchizedek, king of Salem, priest of the most high God, who met Abraham returning from the slaughter of the kings, and blessed him; to whom also Abraham gave a tenth part of all; first being by interpretation King of righteousness, and after that also King of Salem, which is, King of peace" (Hebrews 7:1-2).
Hebrews - 6:19:-
6:18 That by two immutable things, in which it was impossible for God to lie, we might have a strong consolation, who have fled for refuge to lay hold upon the hope set before us:
6:19 Which hope we have as an anchor of the soul, both sure and stedfast, and which entereth into that within the veil;
6:20 Whither the forerunner is for us entered, even Jesus, made an high priest for ever after the order of Melchisedec. - Melchizedek
The Lord has sworn
and will not change his mind:
You are a priest forever.
Because of this oath, Jesus has become the guarantor of a better Covenant.
Now there have been many of those priests, since death prevented them from continuing in office; but because Jesus lives forever, he has a permanent priesthood. Therefore he is able to save completely[c] those who come to God through him, because he always lives to intercede for them.
Such a high priest truly meets our needone who is holy, blameless, pure, set apart from sinners, exalted above the heavens. Unlike the other high priests, he does not need to offer sacrifices day after day, first for his own sins, and then for the sins of the people. He sacrificed for their sins once for all when he offered himself. For the law appoints as high priests men in all their weakness; but the oath, which came after the law, appointed the Son, who has been made perfect forever.
2:17 When Jesus heard it, he saith unto them, They that are whole have no need of the physician, but they that are sick: I came not to call the righteous, but sinners to repentance.
Melchizedek Was God's Priest and Jesus Christ our Saviour was His High Priest in the Order of Melchizedek and Jesus Christ our Saviour eternally with His Mercy in His Holy Will.
First, notice from both Old and New Testaments that the man of mystery, Melchizedek, was a priest of the Most High God. Turn 'low to the account in Genesis 14. During the war between a number of ancient city-states in Canaan and Mesopotamia, Abraham's nephew Lot had been captured. He and his family and goods were carted off.
One of their number escaped and brought the news to Abraham, who armed 318 of his own servants and pursued the invaders to what was later named Dan and beyond. Abraham rescued Lot and his family and returned them safely to the Canaanite cities.
Abraham was ministered to by Melchizedek (God The Most High's High Priest then).
"And Melchizedek king of Salem brought out bread and wine; he was priest of God Most High. And he [Melchizedek] blessed him [Abraham] and said, 'Blessed be Abram by God Most High, maker of heaven and earth; and blessed be God Most High, who has delivered your enemies into your hand!' And Abram gave him [Melchizedek] a tenth of everything" that is, a tithe of all, for a tithe means a tenth (Genesis 14:18-20, RSV).
Notice that Melchizedek was king of Salem. That is the city of Jerusalem. "Salem" comes from the Hebrew word meaning "peace." That would make Melchizedek the "King of Peace" (Hebrews 7:2). The Hebrew name Melchizedek itself means "King of Righteousness" (Hebrews 7:2). The same individual is mentioned in Psalm 110:4. Speaking prophetically of Christ, David stated: "The Eternal hath sworn, and will not repent, Thou art a priest forever after the order of Melchizedek." This verse is quoted again in Hebrews 5:6, 10. Hebrews 7 - Melchizedek
"For this Melchizedek, king of Salem, priest of the most high God, who met Abraham returning from the slaughter of the kings, and blessed him; to whom also Abraham gave a tenth part of all; first being by interpretation King of righteousness, and after that also King of Salem, which is, King of peace" (Hebrews 7:1-2).
God The Most High appeared to His "priests" and "high priests" BC.
Jesus Christ our Saviour was made High Priest by God The Most High while being our Saviour for eternity with His Mercy, (Divine Mercy) in His Holy Will of which God The Most High makes reference to the 'forthcoming Messiah with Mercy" in His Old Testament.
Jesus made this clear within His New Testament to: "Repent and believe in The Good News" telling His Disciples (His priests).
God The Most High made this clear to His Apostles BC - "repent of sins".