Progress is impossible without change, and those who cannot change their minds, can't change anything.

The only thing worse than being blind is having sight but no vision.

I am so clever that sometimes I don't understand a single word of what I am saying.

Happiness is as a butterfly which, when pursued, is always beyond our grasp, but which if you will sit down quietly, may alight upon you

Let us learn from the lips of death the lessons of life.

Your value is not determined by your past mistakes; it is defined by your capacity to learn and grow from them.

The greatest fear in the world is the opinion of others.