Those who live for hope alone find that the immediate future always slips from their grasp. Ad Lucilium Epistulae Morales

I have always thought that clarity is a form of courtesy that the philosopher owes; moreover, this discipline of ours considers it more truly a matter of honor today than ever before to be open to all minds … This is different from the individual sciences which increasingly [interpose] between the treasure of their discoveries and the curiosity of the profane the tremendous dragon of their closed terminology. What is Philosophy? 

"The real root of suffering is this never-ending and pointless pursuit of ephemeral feelings, which causes us to be in a constant state of tension, restlessness and dissatisfaction." Sapiens: A Brief History of Humankind

That time does not run backward, that is its wrath; "That which was"--that is the name of the stone it cannot roll. Thus Spoke Zarathustra