The wise person finds enemies more useful than the fool does friends .
Aspire rather to be a hero than merely appear one.
The envious die not once, but as oft as the envied win applause. Baltasar Gracia
There are rules to luck, not everything is chance for the wise; luck can be helped by skill.
There are friendships merely for pleasure, some for the exchange of ideas. Rarest are those friends of one's inmost self.