A great source of calamity lies in regret and anticipation; therefore a person is wise who thinks of the present alone, regardless of the past or future.
A man who leaves home to mend himself and others is a philosopher; but he who goes from country to country, guided by the blind impulse of curiosity, is a vagabond.
As writers become more numerous, it is natural for readers to become more indolent; whence must necessarily arise a desire of attaining knowledge with the greatest possible ease.
