Only idiots refuse to change their minds.

I think, therefore I am.

Things which matter most must never be at the mercy of things which matter least.

Those who can not change their minds can not change anything.

The greatest of wealth is the richness of the soul.

Men are not prisoners of fate, but only prisoners of their own minds.

No act of kindness, no matter how small, is ever wasted.

Experience is the only prophecy of wise men.

Better mad with the rest of the world than wise alone.

Whatever it is you're seeking won't come in the form you're expecting.

Nature is pleased with simplicity. And nature is no dummy

A man who as a physical being is always turned toward the outside, thinking that his happiness lies outside him, finally turns inward and discovers that the source is within him.

One never notices what has been done; one can only see what remains to be done.

I have had good experience and trial of this world...I know what it is to be a subject, what to be a sovereign, what to have good neighbours, and sometimes meet evil willers. I have found treason in trust, seen great benefits little regarded.

For we walk by faith, not by sight

There is a wisdom of the head, and... there is a wisdom of the heart.

Let no man pull you low enough to hate him.

Science is organized knowledge. Wisdom is organized life.

Doubt is the origin of wisdom

Half the world is composed of people who have something to say and can't, and the other half who have nothing to say and keep on saying it.

Beauty is not in the face; beauty is a light in the heart.