 Continuous practice of moral virtues and a conscious effort to internalize those qualities can lead to the formation of a morally good character.Al-Isfahani says that purification of soul means the control, not the elimination, of desires.According to Birgivi, changing of character depends on such things as 'a person's wish' and 'the strength of one's understanding', and the preservation of a good character requires the avoidance of the company of evil-charactered people who indulge into indecent activities, drunkenness, and meaningless gossip.