Problem XXX is a short text, attributed by Seneca, Plutarch, and Cicero, to Aristotle on the subject of melancholy.

The art of seizing the opportunity is not an exact science. It is not transferable or reproducible according to external criteria, because it calls more on intuition than reason, that quality which creates geniuses, great men, fine strategists, good doctors or even great seducers.

Actuellement et plus que jamais, les notions d’autorité et de pouvoir se confondent. Or, l’autorité n’est que ce qui légitime le pouvoir...