Knowledge is in the end based on acknowledgement.
A logical picture of facts is a thought.
No one can think a thought for me in the way that no one can don my hat for me.
Black seems to make a colour cloudy, but darkness doesn't. A ruby could thus keep getting darker without ever becoming cloudy; but if it became blackish red, it would become cloudy.
I am my world.
Believers who have formulated such proofs [for God's existence] ... would never have come to believe as a result of such proofs