Monergism

Pride is the worst viper that is in the heart; it is the first sin that ever entered into the universe, and it lies lowest of all in the foundation of the whole building of sin, and is the most secret, deceitful and unsearchable in its ways of working, of any lusts whatsoever; it is ready to mix with everything; and nothing is so hateful to God, and contrary to the spirit of the Gospel, or of so dangerous consequence; and there is no one sin that does so much let in the Devil into the hearts of the saints, and exposes them to his delusions.
Jonathan Edwards Distinguishing Marks