2156  Our greatest weakness lies in giving up. The most certain way to succeed is always to try just one more time.

1711  The greatest way to live with honor in this world is to be what we pretend to be.

1351  Better be wise by the misfortunes of others than by your own.

613  Your most unhappy customers are your greatest source of learning

1710  The least of things with a meaning is worth more in life than the greatest of things without it.