The world of rational beings is by no means so well governed as the physical world, inasmuch as, although it has laws which are by nature unchanging, it does not follow them with the same consistency that the physical world follows its own.
You must live in the world - this is the first natural law of man.
You have to learn a lot to know even a little.
There is no need to achieve by laws what can be achieved by improving morals.
Injustice permitted to one is a threat to all.
The rose weakens the courage more than any other vice.
The harshest tyranny is that which manifests itself under the shelter of law and under the standard of justice.
Freedom is the right to do whatever the laws allow. The freedom of the individual and the freedom of the citizen do not always coincide.
There are truths about which it is not enough to convince someone, because they must be felt; such are the truths of morality.
A woman has only one possibility to be beautiful, but there are a hundred thousand possibilities to be attractive.
Genius is patience of thought directed in a desired direction.
I'm not making assumptions. If I have seen further than others, it is because I have stood on the shoulders of giants.
Nature is simple and does not overdo unnecessary causes.
I consider myself like a child who, playing on the seashore, found a few pebbles smoother and a few shells more variegated than others, while the endless ocean of truth lay unexplored before my eyes.
Divine truths cannot be the object of the art of persuasion, because they absolutely transcend nature.
We will strive, therefore, to think well - here is the beginning of a moral behavior. There is no greater misfortune than when a man begins to fear the truth, not to be unmasked by it.
Everything is created and determined by a single Creator: roots, branches fruits, causes and effects.
All the stars, the firmament, the stars, the earth, and its kingdoms do nothing to the humblest of minds, for it knows all, including itself, while the stars know nothing. But all the stars, taken together, do not even make a single start of mercy - this phenomenon belongs to an incomparably higher order.
Most cherished are those noble deeds which remain unknown.
Geometry is a wonderful way of testing our intellectual powers, and by no means the object of their application.
Even the most brilliant speech produces satiety if it goes on too long.
The conclusions a man arrives at through personal reflection often convince him more strongly than those which have occurred to another.
The search for truth is not done with joy, but with anxiety and disturbance; but, anyway, you must seek it, because if you don't find it and love it, you will perish.
True eloquence does not need the science of oratory, just as true morality does not need the science of morals.
He who does not see the agitation of the world, is himself an agitator.
People are taught likes and dislikes, only honor is not, while people try to make themselves known precisely through honor, that is, precisely through something they have never learned.
We head carelessly towards the abyss, covering our eyes with what we're getting at, just so we don't see where we're running.
We always love not the man, but only his qualities. We will not laugh, therefore, at men who ask to be respected for their ranks and positions, for we love man only for the qualities acquired in exchange for them.
We try to imitate great men more by their weaknesses than by their qualities.
It would be much more philosophical to live simply and peacefully.