True yoga means controlling mind and senses to concentrate on Krishna, the Supreme Personality of Godhead.Listen — Srila Prabhupada Uvaca
Room Conversation With Three College Students — July 15, 1973, London 730715R1-LONDON [44:18 Minutes] Conv_730715R1-LONDON Student (1): Is that what you're trying to do in your movement?
Prabhupāda: [break] movement... I am talking of yoga system. What is my movement, that we shall discuss later on. First of all the question was the yoga.
You asked me that. Yoga means to control the mind and the senses. So if one is not able to control the mind and senses, he does not know what is the meaning of yoga. Student (1): Right.
Prabhupāda: That... You read Bhagavad-gītā? [aside:] Bring Bhagavad-gītā. Revatīnandana: Do you understand the necessity of controlling the mind and the senses?
Can you see why it is necessary? Why would you say it's... Student (1): Yes. Sort of.
Not to the full extent. I can't see how it's necessary to a full extent, because I can't control the mind and the senses.
Prabhupāda: Hmm. Call Pradyumna. Student (1): Because I can't completely control my mind and senses. Revatīnandana: The thing that is covered when we are always acting on the sensual platform, agitated in the mind, is we do not experience our self, our eternal self, which doesn't change.