Your joy is your sorrow unmasked. And the self-same well from which your laughter rises was often-times filled with your tears.

I hope that posterity will judge me kindly, not only as to the things which I have explained, but also to those which I have intentionally omitted so as to leave to others the pleasure of discovery.

It's the familiar love-hate syndrome of seduction: "I don't really care what it is I say, I care only that you like it."

If we possessed a thorough knowledge of all the parts of the seed of any animal (e.g. man), we could from that alone, be reasons entirely mathematical and certain, deduce the whole conformation and figure of each of its members, and, conversely if we knew several peculiarities of this conformation, we would from those deduce the nature of its seed.

How do we know that anything really exists, that anything is really the way it seems ot us through our senses?

Let whoever can do so deceive me, he will never bring it about that I am nothing, so long as I continue to think I am something.

Nothing comes out of nothing.