C. S. Lewis explains the conflict in The Four Loves.
Anyone who has ever taught or attempted to lead others knows the tendency in all of us toward exaggerating our depth of character while treating leniently our flaws. The Bible calls this tendency hypocrisy. We consciously or subconsciously put forward a better image of ourselves than really exists. The outward appearance of our character and the inner reality (that only God, we, and perhaps our family members know) do not match.
(Galaxie Software. (2002; 2002). 10,000 Sermon Illustrations. Biblical Studies Press.)