Heraclitus somewhere says that all things are in process and nothing stays still, and likening existing things to the stream of a river he says that you would not step twice into the same river.

The way up and the way down are one and the same.

Men who are lovers of wisdom [i.e., philosophers] must be inquirers into many things.

The sun is new each day.

Couples are wholes and not wholes, what agrees disagrees, the concordant is discordant. From all things one and from one all things.

To me one man is worth ten thousand if he is first-rate.

The results are in great need greater ambition.