Though wisdom is common, yet the many live as if they had a wisdom of their own.
Life has the name of life, but in reality it is death.
Men that love wisdom must be acquainted with very many things indeed.
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.
Knowing many things doesn't teach insight.
The only thing constant is change