1012  Our greatest weakness lies in giving up. The most certain way to succeed is always to try just one more time.
1449  There is never enough time to do everything, but there is always enough time to do the most important thing.
1531  “I am so clever that sometimes I don't understand a single word of what I am saying.”
951  An error can never become true however many times you repeat it. The truth can never be wrong, even if no one hears it.
969  Do not anticipate trouble or worry about what may happen. Keep in the sunlight