Pride is sometimes called the great sin of the spirit; it was Satan’s sin in the premortal realm (see Isaiah 14:12–14; Moses 4:1–2). Furthermore, pride leads to failure and destruction as the Lord repeatedly warns us:
“Beware of pride, lest thou shouldst enter into temptation” (D&C 23:1).
“For the hour is nigh and the day soon at hand when the earth is ripe; and all the proud and they that do wickedly shall be as stubble; and I will burn them up, saith the Lord of Hosts, that wickedness shall not be upon the earth” (D&C 29:9).
“Be not ashamed, neither confounded; but be admonished in all your high-mindedness and pride, for it bringeth a snare upon your souls” (D&C 90:17).
“He that exalteth himself shall be abased, and he that abaseth himself shall be exalted” (D&C 101:42).