Devotion sweetens the personality, and is the light on the path of the disciple. Those who study mysticism and philosophy while omitting self-sacrifice and resignation grow egoistic and self-centered. Such persons are apt to call themselves either God or a part of God, and thus make an excuse for committing any sins they like. Regardless of sin or virtue they misuse and malign others, being utterly fearless of the hereafter. Yet they forget that "strait is the gate, and narrow is the way, which leadeth unto life", as the Bible says.