By St. Basil the Great
Love for God cannot be taught. No one taught us to enjoy the light nor to want life, nor anyone else taught us to love our parents or those who raised us.
Similarly or rather much more, knowledge of divine love does not come from outside. But in the same time when man was composed, a seminal reason was deposited in us, which has by itself the causes of appropriating love....
Only the good is properly beautiful and lovable. God is good. Everything loves good, therefore, everything loves God.... To be alienated and to depart from God is unbearable, even more than the fire of hell....
From The Long Rules, Rule 2.