1655  Man needs his difficulties because they are necessary to enjoy success,

1919  Our greatest weakness lies in giving up. The most certain way to succeed is always to try just one more time.

2077  You must not lose the faith in Humanity. Humanity is an ocean, if the few drops of ocean are dirty, the ocean does not become dirty....

2551  True morality consists, not in following the beaten track, but in finding a new path for ourselves and in fearlessly following it.

2189  There is never enough time to do everything, but there is always enough time to do the most important thing.