You won't discover the limits of the soul, however far you go.

The only thing that is constant is change.

Whoever cannot seek the unforeseen sees nothing for the known way is an impasse.

The only thing constant is change

No same man could walk through the same river twice, as the man and the river have since changed.

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.

Wisdom consists in speaking and acting the truth.