The truth is that you cannot attain God if you have even a trace of desire. Subtle is the way of dharma. If you are trying to thread a needle, you will not succeed if the thread has even a slight fiber sticking out.
When anything is in the presence of evil, but is not as yet evil, the presence of good arouses the desire of good in that thing; but the presence of evil, which makes a thing evil, takes away the desire and friendship of the good; for that which was once both good and evil has now become evil only, and the good has no friendship with evil.
The broad effects which can be obtained by punishment in man and beast, are the increase of fear, the sharpening of the sense of cunning, the mastery of the desires; so it is that punishment tames man, but does not make him "better.".
Desire can be eradicated from the roots by firmly imbibing the four attributes of: Jnan, Atmanishtha, Vairagya, Dharma and the full fledged devotion to God.
There is no greater sin than desire, No greater curse than discontent, No greater misfortune than wanting something for oneself. Therefore he who knows that enough is enough will always have enough.