There is but one evil, ignorance.

War is a grim, cruel business, a business justified only as a means of sustaining the forces of good against those of evil.

Ignorance is the curse of God; knowledge is the wing wherewith we fly to heaven.

That within the best of us, there is some evil, and within the worst of us, there is some good. When we come to see this, we take a different attitude toward individuals.

Ignorance more frequently begets confidence than does knowledge: it is those who know little, and not those who know much, who so positively assert that this or that problem will never be solved by science.

Beware of false knowledge; it is more dangerous than ignorance.