The great wars of the present age are the effects of the study of history.
The bite of conscience is indecent.
Mastery has been achieved when one neither makes a mistake nor hesitates in the performance.
We evaluate the services that anyone renders to us according to the value he puts on them, not according to the value they have for us.
That which does not destroy, strengthens.
[Heraclitus speaks as if] in entrancement ... but [also] truthfully.