Romans 4:2 & 3
If, in fact, Abraham was justified by works, he had something to
boast about - but not before God. What does the scripture say? 'Abraham believed God,
and it was credited to him as righteousness.'
Here, Paul quotes from Genesis
15:6 which is the story of God's covenant (promise) to make his offspring as
numerous as the stars in the sky. He was declared righteous because of his belief
(faith). As an old man, Abraham was told to demonstrate his faith by offering his only
son as a sacrifice. By faith in God, he went to obey but God stopped him from actually
doing it. Not many of us would be willing to give up our only child as he was but, by
faith, he went to obey. He was already justified by his faith before he even took one
step to sacrifice his son.