" Lao Tzu, Chuang Tzu, Bodhidharma, Sosan – they are the Masters of this law of reverse effect. And this is the difference between Yoga and Zen. Yoga makes every effort and Zen makes no effort, and Zen is truer than any Yoga. But Yoga appeals, because as far as you are concerned doing is easy – howsoever hard, but doing is easy.

Non-doing is difficult. If someone says, ”Don’t do anything,” you are at a loss. You again ask, ”What to do?” If someone says, ”Don’t do anything,” that is the most difficult thing for you. It should not be so if you understand.

Non-doing does not require any qualification. Doing may require qualification, doing may require practice. Non-doing requires no practice. That’s why Zen says enlightenment can happen in a single moment – because it is not a question of how to bring it, it is a question of how to allow it. It is just like sleep: you relax and it is there, you relax and it pops up. It is struggling within your heart to come up. You are not allowing it because you have too much activity on the surface. "

― Osho , Hsin Hsin Ming, the Book of Nothing: Discourses on the Faith Mind of Sosan