One should be very careful of these three enemies to human life: lust, anger and greed. The more a person is freed from lust, anger and greed, the more his existence becomes pure. Then he can follow the rules and regulations
enjoined in the Vedic literature. By following the regulative principles of human life, one gradually raises himself to the platform of spiritual realization. If one is so fortunate, by such practice, to rise to the platform of Krsna consciousness, then success is guaranteed for him. In the Vedic literature, the ways of action and reaction are prescribed to enable one to come to the stage of purification. The whole method is based on giving up lust, greed and anger.
>>> Ref. VedaBase => Bg 16.22
The
strong bodily desires and needs of a person disturbed by hunger and thirst are certainly satisfied when he eats. Similarly, if one becomes very angry, that anger is satisfied by chastisement and its reaction. But as for greed, even if a greedy person has conquered all the directions of the world or has enjoyed everything in the world, still he will not be satisfied.
>>> Ref. VedaBase => SB 7.15.20