You must have mechanical knowledge to live in this world, to go to your office, to function as an engineer, as an electrician, as a violinist. That is necessary. But we are talking of change, not in the machinery of daily, operational tasks, but in the machinery the psyche builds. We are talking of a revolution in consciousness, in the psyche, in the entire being, not in superficial, technical knowledge. That will go on, that you must have, but the mind that uses this technical knowledge, the mind that functions in daily activities, if there is not a complete change, a revolution, a mutation, then the superficial mechanism becomes destructive, harmful, ugly, brutal. And that is what is happening in the world.