Leave in concealment what has long been concealed. Oedipus

Friendship is always a sweet responsibility, never an opportunity. Sand and Foam

Necessity is a violent school-mistress. Essays

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. History as a System