No, wisdom is not concerned at all with knowledge. It is concerned with awareness, intelligence, understanding. Be more alert. Then you are not in the grip of the mind. Then you can use the mind whenever needed but you are not used by the mind. Then the mind is no longer the master – you are the master and the mind is the servant. Whenever you need the servant you ask, but you are not ruled by, you are not manipulated by, the mind.
The ordinary situation of mind is such as if the car is manipulating the driver. The car says, “Go this way,” and the driver has to follow. Sometimes it happens: brakes fail, the wheel is not functioning well, you wanted to go to the south and the car moves to the north. The mechanism has failed; it is an accident. But that accident has become normal with human mind. Continuously you want to go somewhere and the mind wants to go somewhere else. You wanted to go to the temple and the mind was thinking to go to the theater, and you find yourself in the theater. Maybe you had come out of your house to go to the temple to pray…you are sitting in a theater – because the car wanted to move that way and you are incapable.
Intelligence is a mastery – mastery of all the mechanisms within you. The body is a mechanism, the mind is a mechanism: you become the master. Nobody is manipulating you; the mind simply receives your orders. This is intelligence.
So if you ask, “Are some people more stupid than others?” – it depends. As I see, people are knowledgeable stupids, not-knowledgeable stupids: these are the ordinary two categories, because the third category is so unique you cannot make it a category. Rarely, sometimes, a buddha happens: a buddha is intelligent. But then he looks rebellious because he does not give your pat answers, fixed answers. He moves away from the superhighway; he has his own path. He makes his own path. Intelligence always follows itself. It does not follow anybody. Intelligence makes its own path. Only stupid people follow.
If you are here with me you can be here in two ways. You can be intelligently here with me: then you will learn from me, but you will not follow. You will follow your own intelligence. But if you are stupid you don’t bother about learning: you simply follow me. That looks simple, less risky, less dangerous, more secure, safe, because you can always throw the responsibility on me; but if you choose a secure safety-way, you have chosen death. You have not chosen life. Life is dangerous and risky. Intelligence will always choose life – at any cost, whatsoever the risk – because that’s the only way to be alive.
Intelligence is a quality of awareness. Intelligent people are not stupid.
The second question:
What is the difference between introspection and self-remembering?
A lot of difference. Introspection is thinking about yourself. Self-remembering is not thinking at all: it is becoming aware about yourself. The difference is subtle, but very great.