Nothing is more intolerable than to have to admit to yourself your own errors.

It is better to remain silent and be thought a fool than to open one's mouth and remove all doubt.

Science is organized knowledge. Wisdom is organized life.

Let there be spaces in your togetherness.

Nothing is as easy as it looks.

The most certain sign of wisdom is cheerfulness.

Having a great intellect is no path to being happy.

As our case is new, we must think and act anew.

The simple things are also the most extraordinary things, and only the wise can see them.

It takes a lot of courage to show your dreams to someone else.

I am a lover of truth, a worshipper of freedom, a celebrant at the altar of language and purity and tolerance.

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

I hear and I forget. I see and I remember. I do and I understand.

Where wisdom reigns, there is no conflict between thinking and feeling.

The greatest pride, or the greatest despondency, is the greatest ignorance of one's self.

The greatest minds are capable of the greatest vices as well as of the greatest virtues.

Between stimulus and response there is a space. In that space is our power to choose our response. In our response lies our growth and our freedom.

When I stand before God at the end of my life, I would hope that I would not have a single bit of talent left, and could say, 'I used everything you gave me'.

To a wise and good man the whole earth is his fatherland.

The one you buy will be the only one that doesn't work.

The ultimate authority must always rest with the individual's own reason and critical analysis.