For things remain possible, even if God does not choose them. Indeed, even if God does not will something to exist, it is possible for it to exist, since, by its nature, it could exist if God were to will it to exist.

Reality cannot be found except in One single source, because of the interconnection of all things with one another.

There are also two kinds of truths: truth of reasoning and truths of fact.

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 words 'Here you can find perfect peace' can be written only over the gates of a cemetery.

The art of discovering the causes of phenomena, or true hypotheses, is like the art of deciphering, in which an ingenious conjecture often greatly shortens the road.

I have said more than once, that I hold space to be something purely relative, as time; an order of coexistences, as time is an order of successions.