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

There is nothing without reason.

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.

Either there are no corporeal substances, and bodies are merely phenomena which are true or consistent with each other, such as a rainbow or a perfectly coherent dream, or there is in all corporeal substances something analogous to the soul.

It is necessary to believe that the mixture of evil has produced the greatest possible good: otherwise the evil would not have been permitted.

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.

To love is to find pleasure in the happiness of others.