Romans 4:21

21 and being absolutely certain that whatever promise He is bound by He is able also to make good.

Romans 4:21 Meaning and Commentary

Romans 4:21

And being fully persuaded
He had not only faith, a strong faith, but full assurance of faith:

that what he [God] had promised;
though it was so long ago, and there were so many difficulties in the way;

he was able,
being the Lord God Almighty,

to perform;
so his faith rested upon the power of God, with whom nothing is impossible.

Romans 4:21 In-Context

19 And, without growing weak in faith, he could contemplate his own vital powers which had now decayed--for he was nearly 100 years old--and Sarah's barrenness.

20 Nor did he in unbelief stagger at God's promise, but became mighty in faith, giving glory to God,

21 and being absolutely certain that whatever promise He is bound by He is able also to make good.

22 For this reason also his faith was placed to his credit as righteousness.

23 Nor was the fact of its being placed to his credit put on record for his sake only;