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. Or one who is on the fiftieth step, he cannot be compared with the man who is on the five-hundredth step.
Similarly, in the Bhagavad-gītā you'll find karma-yoga, jñāna-yoga, dhyāna-yoga, bhakti-yoga. It is stated with the name yoga, because the whole ladder is connected with the topmost floor. So every system is connected with God, Kṛṣṇa. But that does not mean every man is on the topmost floor. One who is on the topmost floor, he is to be understood in Kṛṣṇa consciousness. Others, they are just like fifth or fiftieth or five hundred, like that. The whole thing is called ladder.