“Logic is not a theory but a reflexion of the world.”

“We cannot therefore say in logic: This and this there is in the world, that there is not.For that would apparently presuppose that we exclude certain possibilities, and this cannot be the case since otherwise logic must get outside the limits of the world: that is, if it could consider these limits from the other side also.”

“A logical picture of facts is a thought.”

“There can never be surprises in logic.”

“As there is only a logical necessity, so there is only a logicalimpossibility.”

“It is not humanly possible to gather immediately from it what the logic of language is. Language disguises thought.”

“Logic takes care of itself; all we have to do is to look and see how it does it.”