Indeed every monad must be different from every other. For there are never in nature two beings, which are precisely alike, and in which it is not possible to find some difference which is internal, or based on some intrinsic quality.

What is is what must be.

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

I do not conceive of any reality at all as without genuine unity.

There is no way in which a simple substance could begin in the course of nature, since it cannot be formed by means of compounding.

When a truth is necessary, the reason for it can be found by analysis, that is, by resolving it into simpler ideas and truths until the primary ones are reached. It is this way that in mathematics speculative theorems and practical canons are reduced by analysis to definitions, axioms and postulates.

Indeed in general I hold that there is nothing truer than happiness, and nothing happier and sweeter than truth.