Celibacy, yes. Life of celibacy, controlling the sex desire. This is tapasya. Tapasa brahmacaryena samena damena va [SB 6.1.13]. These things are education. And what is this nonsense education how to become a big mechanics of motorcar parts? This is not education. This is sudra, sudra education. It is not education.

From Srila Prabhupada's lecture on Srimad-Bhagavatam 6.1.50 — Detroit, August 3, 1975