Is there any knowledge in the world which is so certain that no reasonable man could doubt it? - Bertrand Russell

I may as well say at once that I do not distinguish between inference and deduction. What is called induction appears to me to be either disguised deduction or a mere method of making plausible guesses.

So far as I can remember there is not one word in the Gospels in praise of intelligence.

I think we ought always to entertain our opinions with some measure of doubt. I shouldn't wish people dogmatically to believe any philosophy, not even mine.