First education is brahmacari, how to train him to avoid sex life. And still if he's not able, then he is allowed to become a grhastha, a little concession. Otherwise, the whole Vedic civilization is: how to avoid sex life. Brahmacari — no sex life. Vanaprastha — no sex life. Sannyasi — no sex life. Only grhastha, under control. That is grhastha. Grhastha does not mean one who is doing everything whimsically on account of getting this concession. He's not grhastha; he's grhamedhi. Apasyatam atma-tattvam grhesu grha-medhinam [SB 2.1.2]. Srotavyadini rajendra nrnam santi sahasrasah, apasyatam atma-tattvam… Grhamedhi means he does not know what is spiritual life. That is grhamedhi. And grhastha means he knows what is spiritual life, and he lives on that status. That is grhastha. Grhamedhi's definition is… Everything is there in the sastra. Apasyatam atma-tattvam. They do not know what is the aim of life. It is something like cats and dogs.

Srila Prabhupada — May 3, 1976, Fiji