He took the most precious thing in his life and was willing to sacrifice it all for God. Never content yourself with empty profession. Profession reveals to what party we addict ourselves, but holiness shows we addict ourselves to God. James conclusion is that a person is justified by what he does and not by faith alone. Far from endorsing a works-salvation, James is offering a comprehensive view of faith.
True faith is that which gives rise to righteous action.
And if it does not, it may not be true faith. This justification of Abraham exonerates him from the charge of hypocrisy. Whereas to Paul, justification is often the opposite to the condemnation of a sinner . . . There are times when all of us do not live as we confess. However, at some time if we have true faith, it will produce Godly fruit.