Stupidity is better kept a secret than displayed.

War is the father of all things.

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

You can never step in the same river twice.

Of the Logos which is as I describe it men always prove to be uncomprehending, both before they have heard it and when once they have heard it. For although all things happen according to this Logos, they [men] are like people of no experience, even when they experience such words and deeds as I explain, when I distinguish each thing according to its constitution and declare how it is; but the rest of men fail to notice what they do after they wake up just as they forget what they do when asleep.

Good character is not formed in a week or a month. It is created little by little, day by day. Protracted and patient effort is needed to develop good character.

The majority of people have no understanding of the things with which they daily meet, nor, when instructed, do they have any right knowledge of them, although to themselves they seem to have.