Heraclitus

“The only constant in life is change.”

“The eyes are more exact witnesses than the ears.”

“Everything flows and nothing abides; everything gives way and nothing stays fixed.”

“Dogs bark at what they don't understand.”

“Wisdom is one thing. It is to know the thought that steers all things through all things.”

“The sun is new each day.”

“To God all things are fair and good and right, but men hold some things wrong and some right.”

“No man ever steps in the same river twice, for it's not the same river and he's not the same man.”

“War is the father of all and king of all.”

“All things are an exchange for fire, and fire for all things, as goods for gold and gold for goods.”

“Nature loves to hide.”

“Much learning does not teach understanding.”

“The waking have one common world, but the sleeping turn aside each into a world of his own.”

“The sea is the purest and the impurest water. Fish can drink it and it is good for them; to men it is undrinkable and destructive.”

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

“Character is destiny.”

“A hidden connection is stronger than an obvious one.”

“Time is a game played beautifully by children.”

“Opposition brings concord. Out of discord comes the fairest harmony.”

“It is not good for men to get all they wish.”