The letter kills, while the Spirit gives life. One can be as clear as crystal on doctrine and just as cold and hard in applying it to others. That fact, however, is no excuse for disregarding sound doctrine but a reminder that truth is to be spoken in love, while not compromising. Of course there are peripheral matters upon which there can be disagreement—but not when it affects the salvation of souls. Unfortunately, a false gospel is being preached today, and Paul said that those who do so are under God’s curse.
"Who also hath made us able ministers of the new testament; not of the letter, but of the spirit: for the letter killeth, but the spirit giveth life."