Prabhupāda: Dayā. One must be merciful. Dayā means... When a man is suffering a fellow man, another fellow man must feel for it. That is called dayā. There are two things: dayā and sevā. Sevā means to give service to the superior, and dayā means to give service to the inferior. Both of them are service. Dayā, I mean to say... A man is suffering. He is in helpless condition. Just like in hospital, those who are patients, who are diseased, they go to the hospital There is also sevā. The nurse is serving. The doctor is serving. But that is not sevā. That is called dayā. He is not obliged, but out of his compassion, he's giving service to the patient. That is called dayā. And sevā means superior. Just like spiritual master. Sevayā. Tad viddhi praṇipātena paripraśnena sevayā (BG 4.34). Because the Vedic injunction is that "You must go to a spiritual master." Tad-vijñānārthaṁ sa gurum evābhigacchet (MU 1.2.12). Abhigacchet means "must." There is no alternative. If you're actually interested in transcendental knowledge, tad-vijñānam... Tad-vijñānam means transcendental knowledge. Athāto brahma jijñāsā. And the human life is meant for tad-vijñānam, to understand.
So tad-vijñānārthaṁ sa gurum evābhigacchet. So there, how to learn from guru, that is also stated. Tad viddhi: try to learn from him... Tad viddhi praṇipātena. First of all surrender yourself. You cannot go to any person for learning anything where there is no sense of surrender. I accept a guru, but in my mind I remain independent, "Oh, why shall I abide by the orders of guru?" That means there is no surrender. There is no surrender. It is false. It is just to satisfy some motive, but that will not help. If you have got any duplicity in your mind, then you'll never be successful in any field of activities. So the process is... Tad viddhi praṇipātena (BG 4.34). Must be surrendered. Praṇipāta means prakṛṣṭa-rūpeṇa nipāta. And therefore, unless you find somebody where you can fully surrender, don't accept guru. That is cheating. Unless you are fully confident that "I am surrendering to this person. He is... Actually he is superior to me. He can give proper knowledge..."