After the heart is warmed by the divine element, which is love, the next stage is the herb, which is the love of God. But the love of God alone is not sufficient; knowledge of God is also necessary. It is the absence of the knowledge of God which makes a man leave his religion, for there is a limit to man's patience. Knowledge of God strengthens man's belief in God, throws light on the individual and on life. Things become clear; every leaf on a tree becomes as a page of a holy book to one whose eyes are open to the knowledge of God.