Thought springs from that storehouse of memory. So thought is never free, it is always old, there is no such thing as freedom of thought. Thought can never be free in itself, it can talk about freedom, but in itself it is the result of past memories, experiences and knowledge; therefore it is old. Yet one must have this accumulation of knowledge, otherwise one could not function, one could not speak to another, could not go home, and so on. Knowledge is essential.