It's fascinating how many times this one little statement appears about Abraham in the Bible.
Abram believed the LORD, and he credited it to him as righteousness. Gen 15:6
What does the Scripture say? "Abraham believed God, and it was credited to him as righteousness." Rom 4:3
Consider Abraham: "He believed God, and it was credited to him as righteousness." Gal 3:6
And the scripture was fulfilled that says, "Abraham believed God, and it was credited to him as righteousness," and he was called God's friend. James 2:23
Our own righteousness, our own attempts at self-help, at goodness, at behavior modification?
All our righteous acts are like filthy rags. Isaiah 64:6
Such an outlandish contrast!