I accept no principles of physics which are not also accepted in mathematics.

It must not be thought that it is ever possible to reach the interior earth by any perseverance in mining: both because the exterior earth is too thick, in comparison with human strength; and especially because of the intermediate waters, which would gush forth with greater impetus, the deeper the place in which their veins were first opened; and which would drown all miners.

But in my opinion, all things in nature occur mathematically.

The reading of all good books is indeed like a conversation with the noblest men of past centuries who were the authors of them, nay a carefully studied conversation, in which they reveal to us none but the best of their thoughts.

How can you be certain that your whole life is not a dream?

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

The first precept was never to accept a thing as true until I knew it as such without a single doubt.