i'm not under any illusions of thinking that i know when in fact i don't whereas, other people are under this illusion of thinking that they know when in fact they don't and this teaches us a general lesson about the nature of self knowledge i want to suggest that is to say self knowledge is a matter requires a certain amount of wisdom and wisdom is not just a matter of having a lot of information of knowing lots of things, wisdom is also of knowing your limitations, knowing which you don't have.