The difference of race is one of the reasons why I fear war may always exist; because race implies difference, difference implies superiority, and superiority leads to predominance.

All my successes have been built on my failures.

It shows you exactly how a star is formed; nothing else can be so pretty! A cluster of vapor, the cream of the milky way, a sort of celestial cheese, churned into light.

Nature is more powerful than education; time will develop everything.

What are the most brilliant of our chymical discoveries compared with the invention of fire and the metals?

Perseverance and tact are the two most important qualities for the individual who wants to move ahead.

I have brought myself, by long meditation, to the conviction that a human being with a settled purpose must accomplish it, and that nothing can resist a will which will stake even existence upon its fulfillment.