All buddhas preach emptiness. Why? Because they wish to crush the concrete ideas of the students. If a student even clings to an idea of emptiness, he betrays all buddhas. One clings to life although there is nothing to be called life; another clings to death although there is nothing to be called death. In reality there is nothing to be born, Consequently there is nothing to perish.

― Bodhidharma

Mind is simply a combination of all the thoughts, of all the clouds. Mind has no independent nature of its own. When all the thoughts are gone and the sky is clean and clear, you will see that everything that you have paid so much attention to is nothing but emptiness. Your thoughts were all empty. They contained nothing, they were void.

― OSHO