Always faithful

I will talk about Hebrews 6:16-20. This was written to the Jewish believers in Jesus but non-Jewish believers in Jesus can receive hope in these verses.
God made an pact with Abraham and the line went to Issac then Jacob. God gave the Old Testament laws to the Jews. The Old Testament laws were a foreshadow of the New Testament and Jesus was the fulfillment of the Old Testament.
Many non-Messianic Jews says that Jesus came to abolish the Old Testament law but they need to read Matthew 5:17-18. Matthew 5:17-18 says, "  Do not think that I have come to abolish the Law or the Prophets; I have not come to abolish them but to fulfill them. ¹⁸ For truly I tell you, until heaven and earth disappear, not the smallest letter, not the least stroke of a pen, will by any means disappear from the Law until everything is accomplished."
The order of  Melchizedek is an higher order than the tribe of Levi. Psalm 110:4 says, "The Lord has sworn and will not change his mind: 'You are a priest forever, in the order of Melchizedek.” This passage is talking about Jesus and he fulfilled this prophecy.
God the Father so loved the world he give his one and only Son to redeem mankind.
John 3:16-17 says, "For God so loved the world that he gave his one and only Son, that whoever believes in him shall not perish but have eternal life. ¹⁷ For God did not send his Son into the world to condemn the world, but to save the world through him."

Hebrews 6:16-20

 ¹⁶ People swear by someone greater than themselves, and the oath confirms what is said and puts an end to all argument. ¹⁷ Because God wanted to make the unchanging nature of his purpose very clear to the heirs of what was promised, he confirmed it with an oath. ¹⁸ God did this so that, by two unchangeable things in which it is impossible for God to lie, we who have fled to take hold of the hope set before us may be greatly encouraged. ¹⁹ We have this hope as an anchor for the soul, firm and secure. It enters the inner sanctuary behind the curtain, ²⁰ where our forerunner, Jesus, has entered on our behalf. He has become a high priest forever, in the order of Melchizedek.