Anything that springs from self, however small it may be, is sin. Self-energy or self-complacency in service is sin. Self-pity in trials or difficulties, self-seeking in business or Christian work, self-indulgence in one's spare time, sensitiveness, touchiness, resentment and self-defense when we are hurt or injured by others, self-consciousness, reserve, worry, fear, all spring from self and all are sin.
Roy Hession