Music is a secret and unconscious mathematical problem of the soul.
It's easier to be original and foolish than original and wise.
Everything that is possible demands to exist.
Virtue is the habit of acting according to wisdom.
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.
Take what you need, do what you should, you will get what you want.
The present is saturated with the past and pregnant with the future.
He who hasn't tasted bitter things hasn't earned sweet things.
The world is not a machine. Everything in it is force, life, thought.
Music is a hidden arithmetic exercise of the soul, which does not know that it is counting.
Make me the the master of education, and I will undertake to change the world.
Nihil est sine ratione. There is nothing without a reason.
Why is there anything at all rather than nothing whatsoever?
The most perfect society is that whose purpose
is the universal and supreme happiness.
To love is to place happiness in the heart of another.
Reality cannot be found except in One single source, because of the interconnection of all things with one another.
The words 'Here you can find perfect peace' can be written only over the gates of a cemetery.
He who understands Archimedes and Apollonius will admire less the achievements of the foremost men of later times.
What is is what must be.
To love is to find pleasure in the happiness of others.
A great doctor kills more people than a great general.
To love is to take delight in happiness of another, or, what amounts to the same thing, it is to account another's happiness as one's own.
It is necessary to believe that the mixture of evil has produced the greatest possible good: otherwise the evil would not have been permitted.
We live in the best of all possible worlds
Indeed in general I hold that there is nothing truer than happiness, and nothing happier and sweeter than truth.
There are also two kinds of truths: truth of reasoning and truths of fact.
Thus God alone is the primary Unity, or original simple substance, from which all monads, created and derived, are produced.
There is nothing waste, nothing sterile, nothing dead in the universe; no chaos, no confusions, save in appearance.
Imaginary numbers are a fine and wonderful refuge of the divine spirit almost an amphibian between being and non-being.
Nothing is necessitated whose opposite is possible.
Every present state of a simple substance is the natural consequence of its preceding state, in such a way that its present is big with its future.
The present is big with the future, the future might be read in the past, the distant is expressed in the near.
Nature does not make leaps.
Taking mathematics from the beginning of the world to the time when Newton lived, what he had done was much the better half.