1921  Our greatest weakness lies in giving up. The most certain way to succeed is always to try just one more time.

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

2364  “I am so clever that sometimes I don't understand a single word of what I am saying.”

1763  An error can never become true however many times you repeat it. The truth can never be wrong, even if no one hears it.

1410  As far as we can discern, the sole purpose of human existence is to kindle a light in the darkness of mere being.