Osho Says

Yoga means union the science of union. Meditation is the most remarkable process as far as union with reality is concern. Yoga is a method to come to a non-dreaming mind. Yoga is the science to be in the here and now. Yoga means to encounter the reality as it is. So one can enter yoga, or the path of yoga, only when he is totally frustrated with his own mind as it is. If you are still hoping that you can gain something through your mind, yoga is not for you. A Total frustration is needed.
So many become interested but very few enter, because your interest may be just because of your mind. You may be hoping that now through yoga, you may gain something, but the achieving motive is there that you may become perfect through yoga, you may reach to the blissful state of perfect being, you may become one with the Brahman.

Yoga means: “Now no hope , now no future, now no desires. But I am ready to what is. I am interested in what can be, what should be. I am not interested! I am interested only in that which is- because only the real can free you, only the reality can become liberation.
Total despair is needed. That despair is called dukkha by buddha.

Yoga is not a religion, remember that. Yoga is not hindu, it is not mohammad, yoga is pure science. Yoga is a science it is just an accident that hindus discovered it. It is not hindu. It is pure mathematics of the inner being. So a mohammad can be a yogi, a Christian can be a yogi, a jain , a Buddhist can be a yogi . Yoga is pure science and patanjali is the greatest name as far as the world of yoga is concerned . this man is rare, there is no other name comparable to patanjali. For the first time in the history of humanity this man brought religion to the statue of a science. He made religion a science, pure laws, no belief is needed.

Yoga says “experience”. Just as science says “Experiment and experience are both the same, their directions are different, experiment means there is something you can do outside, experience means there is something you can do inside. Experience is an inner experiment