Osho explains that these sutras are concerned with aspects of man's unawareness and that Buddha's whole message is concerned with the raising of our consciousness. These sutras were compiled by Buddha's disciples to contain the essence of all his teachings. This was the last turning of the Wheel of Dharma, 2,500 years ago. At the beginning of his commentaries on these sutras, Osho says he is setting the Wheel of Dharma in motion again.
"Buddha transformed the word meditation. Meditation had always been something of the mind, and Buddha brought a new quality, so totally new, diametrically opposite to the old meaning: He said, meditation means a state of no mind. It is not concentration; it is not contemplation. It is not thinking; it is not thinking about God. It is not even prayer - because thinking is of the head, intellectual; prayer is emotional. That is another side of the head, not very far away from it; a different language used by another part of the head." (Osho)
Talks are "meditating talks", allowing the listener an experience of meditation. "These words of Buddha come from eternal silence. They can reach you only if you receive them in silence."