By His Divine Grace A. C. Bhaktivedanta Swami Prabhupāda
The conclusion is that one should be completely satiated from the attachment of sex. Then he is liberated. Liberation means no more material life, and the basic principle of material life is sex. Therefore whole Vedic civilization is based on to train people on how to become free from sex desire. The great emperor Yāmunācārya gave his experience of how he became liberated from sex desire: “Since I have given my mind and heart in the service of the lotus feet of Lord Krishna, I have increased my transcendental, blissful life by rendering such loving service. Since then even if I think of sex life… even thinking of it becomes so abominable that I spit on it.” So this is the test of advancement in Krishna conscious life.
When Śrī Caitanya Mahāprabhu delivered Jagāi-Mādhāi, He made the condition that He would accept them only if they promised to give up the four principles of sinful life. Jagāi and Mādhāi were debauchees since they were indulging in drinking, illicit sex, meat eating and these things. These four principles are the four pillars of degradation. Therefore we prohibit these four activities. If you want to make progress in Krishna consciousness, you must give up these four principles.
So, Caitanya Mahāprabhu made this condition that, “If you promise that you will give up these four principles of sinful life, then I will accept you. Never mind whatever you have done in the past.” Every man is sinful – there is no doubt about it – more or less. Being sinful is not a disqualification. But if he agrees to give up the sinful activities, then he immediately becomes liberated. Krishna also says in the Bhagavad-gita, aham tvām sarva-pāpebhyo moksayisyāmi. Liberation is not very difficult. It can be obtained in one minute, provided you want to take it.
Just like Krishna says,
sarva-dharmān parityajya mām ekam śaranam vraja
aham tvām sarva-pāpebhyo moksayisyāmi mā śucah
“Abandon all varieties of religion and just surrender unto Me. I shall deliver you from all sinful reactions. Do not fear.” [Bg. 18.66]
[An excerpt from a lectured delivered on the Śrīmad-Bhāgavatam 5.5.9 at Vrindavana on October 31, 1976]