"Virtue by premeditation isn't worth much." — Georg C. Lichtenberg

That man is the noblest creature may also be inferred from the fact that no other creature has yet contested this claim.

A book is a mirror: if an ape looks into it an apostle is hardly likely to look out.

Nothing can contribute more to peace of soul than the lack of any opinion whatever.

There is no greater impediment to progress in the sciences than the desire to see it take place too quickly.