Eloquence; it requires the pleasant and the real; but the pleasant must itself be drawn from the true.

Curiosity is nothing more than vanity. More often than not we only seek knowledge to show it off.

Nature is an infinite sphere of which the center is everywhere and the circumference nowhere.

We never live, but we hope to live; and as we are always arranging to be happy, it must be that we never are so.

Orthodoxy on one side of the Pyrenees may be heresy on the other.

...for the truth is always older than all the opinions men have held regarding it; and one should be ignoring the nature of truth if we imagined that the truth began at the time it came to be known.

It is not certain that everything is uncertain.