All those that believe they are justified in the eyes of God, have Paul to "thank" for this view, as do those that beleive that we are under God's grace through Jesus.
Many times Paul states, "the lord says..." and other times he says " I and not the Lord say.."
The bible is inspired by God, BUT written by Man, we must never forget that.
We also need to remember that while Paul was controversial at times, ALL the NT must be take into account and not just one writer or one book or even one verse.
Imagine if there was no epistles at all and only Matthew and Revelation for example or there was no Johnanine works, imagin if there was no Pauline theology AT ALL, no controversy AND no justification by Faith, no grace under God.