Abstract: As absolute knowledge is impossible, so is the absolute knowability of the universe. In the process of the infinite development of knowledge, there forever exists between thinking and existence only the identity that is concrete, relative conditional and similar, and the explanation of the universe knowability is historical. The question of the concrete, relative and conditional identity between thinking and existence can be solved and proved by practice, which should be taken as the basis for the explanation of the knowability of the universe.

Key words: Knowability, agnosticism, thinking, existence