Singleness of purpose is one of the chief essentials for success in life, no matter what may be one's aim.

I believe in the supreme worth of the individual and in his right to life, liberty, and the pursuit of happiness.

If your only goal is to become rich, you will never achieve it.

I'm glad I wrote the book to show what I found out about the [ Standard Oil Company]. I'm glad many people read my book and found out the truth.

I would rather earn 1% off a 100 people's efforts than 100% of my own efforts.

The best philanthropy is constantly in search of the finalities-a search for a cause, an attempt to cure evils at their source.

I have made many millions but they have brought me no happiness.