1916  Our greatest weakness lies in giving up. The most certain way to succeed is always to try just one more time.
4601  “At the heart of all beauty lies something inhuman.”
2572  “The fool doth think he is wise, but the wise man knows himself to be a fool.”
1288  Work towards your goal without any doubt in achieving it.
1507  The greatest way to live with honor in this world is to be what we pretend to be.