Pliny the Elder

In these matters the only certainty is that nothing is certain.

Why is it that we entertain the belief that for every purpose odd numbers are the most effectual?

To conclude, all other living creatures live orderly and well, after their own kind: we see them flock and gather together, and ready to make head and stand against all others of a contrary kind: the lions as fell and savage as they be, fight not with one another: serpents sting not serpents, nor bite one another with their venomous teeth: nay the very monsters and huge fishes of the sea, war not amongst themselves in their own kind: but believe me, man at man's hand receiveth most harm and mischief.

In comparing various authors with one another, I have discovered that some of the gravest and latest writers have transcribed, word for word, from former works, without making acknowledgment.

Indeed, what is there that does not appear marvelous when it comes to our knowledge for the first time? How many things, too, are looked upon as quite impossible until they have been actually effected?

There is always something new out of Africa.

The best plan is to profit by the folly of others.

This only is certain, that there is nothing certain; and nothing more miserable and yet more arrogant than man.

From the end spring new beginnings.

No mortal man, moreover is wise at all moments.

True glory consists in doing what deserves to be written; in writing what deserves to be read; and in so living as to make the world happier for our living in it.

The only certainty is that nothing is certain.