Mind is the central figure of all the senses. Just like madman, because he cannot fix up his mind, he cannot work properly. Therefore he is called madman. So our process is that we cannot control the mind. But if we engage the mind on the lotus feet of Kṛṣṇa, then everything is controlled. Kṛṣṇa will help. If some way or other you engage your mind at the lotus feet of Kṛṣṇa, sa vai manaḥ kṛṣṇa-padāravindayoḥ (SB 9.4.18), then gradually everything will be controlled.
There is another version, that sevonmukhe hi jihvādau (Brs. 1.2.234). Jihvādau, to control the jihvā. The jihvā means the tongue. It is very difficult to control the jihvā. People do not know it, but actually this is there. Everyone becomes a servant of the senses just beginning from the tongue. They cannot control the tongue. They eat anything and everything. Therefore they cannot control others senses also. This is the experience of big, big yogīs. Therefore in the yoga practice, yama-niyama . . . in yoga practice also, it is forbidden, not to allow the tongue to eat anything and everything. No. That is not possible. Similarly, we also ask our devotees not to allow your tongue to touch anything except kṛṣṇa-prasādam. Tongue's two business: eating, tasting something, and vibrating sound. So if we can control the tongue not to touch anything which is not offered to Kṛṣṇa, and if we do not allow the tongue to talk anything except Kṛṣṇa, Hare Kṛṣṇa mahā-mantra, then you become the greatest yogī. The greatest yogī. Simply two things.