Krishna is not easily attained. We have to be prepared to pay the highest price for Him. We have to continue performing our austerities for the Lord’s satisfaction and know that we cannot gratify our senses separately from Krishna. If a devotee is going to gratify his senses, he should do so in an authorized way. Such discipline is a stage in spiritual advancement. When we become disciplined, we can become disciples. When a disciple accepts initiation from the spiritual master, he makes a firm vow to give up unauthorized sense gratification.
(BG 6.32 Moscow, 1.8.97)