Revatīnandana: Purport: "When a person is fully engaged in the transcendental loving service of the Lord, he is pleased in himself, and thus he is no longer engaged in sense gratification or in fruitive activities. Otherwise, one must be engaged in sense gratification, since one cannot live without engagement."
Prabhupāda: Yes, that is the point. We must have engagement. We cannot stop. The same example: you cannot stop a child working, or in activities. By nature we are living entities; we must act. It is not possible to stop activities. So just like it is said, "An idle brain is a devil's workshop," so if we have no good engagement, then you will have to engage yourself in something nonsense.
Just like child, if he's not engaged in education, he becomes a spoiled child. Similarly, our two business: either material sense gratification or Kṛṣṇa consciousness, or bhakti-yoga or yoga. So if I am not in yoga system, then I must be in sense gratification. And if I am in sense gratification, there is no question of yoga.
Go on.
Revatīnandana: "Without God consciousness, one must be always seeking self-centered or extended selfish activities. But a Kṛṣṇa conscious person can do everything for the satisfaction of Kṛṣṇa, and thereby be perfectly detached from sense gratification. One who has no such realization must mechanically try to escape material desires before being elevated to the top rung of the yoga ladder."
Prabhupāda: "Yoga ladder." Yoga ladder . . . it has been compared with a ladder. Just like steps. In a big skyscraper house, there are steps. So every step is a progress. That's a fact. So the whole stepladder may be called the yoga system. But one may be on the fifth step, another may be on the fiftieth step, another may be on the five hundredth step, and another may be on the top of the house.
So although the whole ladder is called yoga system, or staircase, but one who is on the fifth step, he cannot be equal with the person who is on the fiftieth step.