It is here [in mathematics] that the artist has the fullest scope of his imagination.

There is nothing that war has ever achieved that we could not better achieve without it.

No faith is our own that we have not arduously won.

Thinking in its lower grades, is comparable to paper money, and in its higher forms it is a kind of poetry.

All arguments are meaningless until we gain personal experience. One must win one's own place in the spiritual world painfully and alone. There is no other way of salvation. The Promised Land always lies on the other side of a wilderness.

Mankind is becoming a single unit, and that for a unit to fight against itself is suicide.

Those persons who are burning to display heroism may rest assured that the course of social evolution will offer them every opportunity.