We live in the best of all possible worlds

...a distinction must be made between true and false ideas, and that too much rein must not be given to a man's imagination under pretext of its being a clear and distinct intellection.

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

The past is pregnant with the present.

Every mind has a horizon in respect to its present intellectual capacity but not in respect to its future intellectual capacity.

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

The larger the mass of collected things, the less will be their usefulness. Therefore, one should not only strive to assemble new goods from everywhere, but one must endeavor to put in the right order those that one already possesses.