'Confirm' in the Bible

But if our unrighteousness serves to confirm God's righteousness, what can we say? God is not unrighteous when he vents his wrath on us, is he? (I am talking in human terms.)

Do we then nullify the Law by this faith [making the Law of no effect, overthrowing it]? Certainly not! On the contrary, we confirm and establish and uphold the Law [since it convicts us all of sin, pointing to the need for salvation].

Now I say that Jesus Christ was a minister of the circumcision for the truth of God, to confirm the promises made unto the fathers: