To the young men destined to be monks the Master pointed out the steep path of renunciation, both external and internal. They must take the vow of absolute continence and eschew all thought of greed and lust. By the practice of continence, aspirants develop a subtle power through which they understand the deeper mysteries of God. For them self-control is final, imperative, and absolute. The sannāsis are teachers of men and their lives should be totally free from blemish. They must not even look at a picture which may awaken their carnal passions.