“You must not think of what you learned as belonging to you. Your learning was only possible because of the people who taught you. If you forget this, before you know it you fall under the illusion that you are the only one who can do it, or the only one who understands. This is called being full of yourself. It is wrong to think, ‘I am strong’, because this strength is nothing but weakness turned inside out. You must think how to act within universal principles.”