Pride

Pride is the self-centered disposition to determine one’s own reality, to be god of one’s own life, to say in every act and word, “My will be done.”

Monergism.com (Aaron Orendorff)

Many...are willing for Christ to save them from Hell, but are not willing for Him to save them from self. They want to be delivered from the wrath to come, but they wish to retain their self-will and self-pleasing. But He will not be dictated unto: you must be saved on His terms, or not at all. When Christ saves, He saves from sin—from its power and pollution, and therefore from its guilt. And the very essence of sin is the determination to have my own way (Isa. 53:6). Where Christ saves, He subdues the spirit of self-will, and implants a genuine, a powerful, a lasting desire and determination to please Him.

A.W. Pink Studies in Saving Faith (2.1)

I may say of pride, many sins have done wickedly, but thou surmountest them all; for the wrathful man, the prodigal man, the lascivious man, the surfeiting [indulging] man, the slothful man, is rather an enemy to himself than to God; the envious man, the covetous man, the deceitful man, the ungrateful man, is rather an enemy to men than to God; but the proud man sets himself against God (because he doth against His laws), he maketh himself equal with God (because he doth all without God and craves no help of Him); he exalteth himself above God (because he will have his own will).

Henry Smith A Puritan Golden Treasury (pg. 224)