If you want to succeed, get some enemies.

The most certain way to succeed is always to try just one more time.

The three great essentials to achieve anything worthwhile are, first, hard work; second, stick-to-itiveness; third, common sense.

I do not wish for anyone's downfall. The world needs successful people. I just think of ways to add more value to myself, and wish that my adversaries would do the same.

Opportunity is missed by most people because it comes dressed in overalls and looks like work.

I am not discouraged, because every wrong attempt discarded is another step forward.