Some are born great, some achieve greatness, and some have greatness thrust upon them.

The greatest discovery of all time is that a person can change his future by merely changing his attitude.

Bitter experience has taught us how fundamental our values are and how great the mission they represent.

Nothing great in the world has ever been accomplished without passion.

My success was not based so much on any great intelligence but on great common sense.

Character, in great and little things, means carrying through what you feel able to do.

Many great actions are committed in small struggles.

Most people say that it is the intellect which makes a great scientist. They are wrong: it is character.

A constant struggle, a ceaseless battle to bring success from inhospitable surroundings, is the price of all great achievements.

Believe deep down in your heart that you're destined to do great things.