The barrier to success is not something which exists in the real world; it is composed purely and simply of doubts about ability.

Often, people just don't see what I see. They have too much doubt. You can't do your best when you're doubting yourself. If you don't believe in yourself, who will?

I'll tell you what leadership is. It's persuasion and conciliation, and education, and patience.

Prison itself is a tremendous education in the need for patience and perseverance. It is above all a test of one's commitment.

Doubts could be swept away only by deeds.

The only limit to our realization of tomorrow will be our doubts of today.