How do we know if a doctrine is from God?

To discern whether a doctrine is from God, one must examine the underlying premise of the teaching: who receives the glory? In John 7:18, Jesus asserts, 'He that speaketh of himself seeketh his own glory; but he that seeketh his glory that sent him, the same is true, and no unrighteousness is in him.' A true doctrine, therefore, will glorify Christ and not man. If a teaching elevates human effort or merit over the grace of God, it is not of divine origin. Thus, believers are called to seek teachings that exalt Christ as the sole source of salvation and truth.