Nihil est sine ratione. There is nothing without a reason.

A great doctor kills more people than a great general.

To love is to find pleasure in the happiness of others.

What is is what must be.

He who understands Archimedes and Apollonius will admire less the achievements of the foremost men of later times.

The words 'Here you can find perfect peace' can be written only over the gates of a cemetery.

Reality cannot be found except in One single source, because of the interconnection of all things with one another.

To love is to place happiness in the heart of another.

The most perfect society is that whose purpose is the universal and supreme happiness.

Why is there anything at all rather than nothing whatsoever?

Make me the the master of education, and I will undertake to change the world.

Music is a hidden arithmetic exercise of the soul, which does not know that it is counting.

The world is not a machine. Everything in it is force, life, thought.

He who hasn't tasted bitter things hasn't earned sweet things.

The present is saturated with the past and pregnant with the future.

Take what you need, do what you should, you will get what you want.

The greatness of a life can only be estimated by the multitude of its actions. We should not count the years, it is our actions which constitute our life.

Virtue is the habit of acting according to wisdom.

Everything that is possible demands to exist.