if.

Galatians 3:10, 12, 26, 29
All who rely on works of the Law are under a curse. For it is written: "Cursed is everyone who does not continue to do everything written in the Book of the Law." . . .

Galatians 2:21
I do not set aside the grace of God. For if righteousness comes through the Law, Christ died for nothing."

Romans 4:13-16
For it was not through the Law that Abraham and his descendants were promised that he would be heir of the world, but through the righteousness that comes by faith. . . .

Romans 8:17
And if we are children, then we are heirs: heirs of God and co-heirs with Christ--if indeed we suffer with Him, so that we may also be glorified with Him.

but.

Galatians 3:16
The promises were spoken to Abraham and to his seed. The Scripture does not say, "and to seeds, " meaning many, but "and to your seed, " meaning One, who is Christ.

Psalm 105:6-12, 42
O offspring of Abraham His servant, O sons of Jacob, His chosen ones. . . .

Micah 7:18-20
Who is a God like You, who pardons iniquity and passes over the transgression of the remnant of His inheritance--who does not retain His anger forever, because He delights in loving devotion? . . .

Luke 1:54, 55, 72, 73
He has helped His servant Israel, remembering to be merciful, . . .

Hebrews 6:12-15
Then you will not be sluggish, but will imitate those who through faith and patience inherit what has been promised. . . .