But in simple substances the influence of one monad over another is ideal only.

I don't say that bodies like flint, which are commonly called inanimate, have perceptions and appetition; rather they have something of that sort in them, as worms are in cheese.

The dot was introduced as a symbol for multiplication by Leibniz. On July 29, 1698, he wrote in a letter to Johann Bernoulli: "I do not like X as a symbol for multiplication, as it is easily confounded with x.

...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.

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

I hold that it is only when we can prove everything we assert that we understand perfectly the thing under consideration.

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