1656  Man needs his difficulties because they are necessary to enjoy success,

1923  Our greatest weakness lies in giving up. The most certain way to succeed is always to try just one more time.

2377  "The weak can never forgive. Forgiveness is the attribute of the strong."

2191  There is never enough time to do everything, but there is always enough time to do the most important thing.

738  Always forgive your enemies; nothing annoys them so much. - Oscar Wilde