What has meditation to do with wisdom?
Wisdom is a by-product of meditation. It does not come in any other way. It does not come through accumulating information. It comes only through the transformation that meditation brings to you. And meditation means a state of no-mind, a consciousness without content.
That's the goal of sannyas. We have to become more and more aware of thoughts, desires, imagination, memory, because this is the secret, that if you watch your mind, slowly slowly it evaporates ¯ just by watching. One day it happens that there is no mind; you are left absolutely alone, in solitude. There is nothing surrounding you, infinite nothingness.
You are fully aware, absolutely aware, but there is nothing to be aware of. You are pure light, but the light is not falling on any object; there is no object left. That is meditation or a state of no-mind. And wisdom is a by-product of it.
Osho, Fingers Pointing to the Moon
(This title is no longer available at Osho's Request)
You will find many more answers to questions like this in the library