Pride destroys a man quicker than ignorance.

The greatest fortress in the universe is an ignorant mind; not even the highest thought can leap over it.

Curiosity may have killed the cat, but ignorance will kill the fool.

The highest wall anyone can scale is ignorance; the tallest mountain anyone can conquer is fear.

Not all slaves are poor, and not all free men are rich.

It is better to win souls than to conquer nations.