Man is not logical and his intellectual history is a record of mental reserves and compromises. He hangs on to what he can in his old beliefs even when he is compelled to surrender their logical basis.

Logic, like whiskey, loses its beneficial effect when taken in too large quantities.

The much vaunted male logic isn't logical, because they display prejudices -- against half the human race -- that are considered prejudices according to any dictionary definition.

Logic works, metaphysics contemplates.

Logic is the anatomy of thought.

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