Revatīnandana: Verse number three: "For one who is a neophyte in the eightfold yoga system, work is said to be the means. And for one who has already attained to yoga, cessation of all material activities is said to be the means."
Prabhupāda: Yes. There are two stages: one who is practicing yoga to reach to the perfectional platform, and one who has attained the perfectional platform. So, so long one is not on the perfectional platform, just trying to do it, at that time there are so many works: that āsana system, yama, niyama. So generally in your country there are so many yoga societies, they display this āsana system: how to sit down, different postures.
That helps. But that is the process simply to get onto the real platform. They are simply means. Real yoga system perfection is different from those bodily gymnastic process. There are two stages. One stage is trying to reach the perfectional platform, and another stage is one who has reached the perfectional platform.