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.

The past is pregnant with the present.

..This is why the ultimate reason of things must lie in a necessary substance, in which the differentiation of the changes only exists eminently as in their source; and this is what we call God.

All things in God are spontaneous.

In whatever manner God created the world, it would always have been regular and in a certain general order. God, however, has chosen the most perfect, that is to say, the one which is at the same time the simplest in hypothesis and the richest in phenomena.

Music is the pleasure the human mind experiences from counting without being aware that it is counting.

I also take it as granted that every created thing, and consequently the created monad also, is subject to change, and indeed that this change is continual in each one.