Contact with [menstrual blood] turns new wine sour, crops touched by it become barren, grafts die, seed in gardens are dried up, the fruit of trees fall off, the edge of steel and the gleam of ivory are dulled, hives of bees die, even bronze and iron are at once seized by rust, and a horrible smell fills the air; to taste it drives dogs mad and infects their bites with an incurable poison.

The only certainty is uncertainty

It [the earth] alone remains immoveable, whilst all things revolve round it.

No mortal man, moreover is wise at all moments.

Nature is to be found in her entirety nowhere more than in her smallest creatures.

Let that which is wanting in income be supplied by economy.

Example is the softest and least invidious way of commanding.