I can, therefore I am.
Without hard work, nothing grows but weeds.
After a storm comes a calm.
Be gentle to all and stern with yourself.
The wise does at once what the fool does at last.
If you can dream it, you can do it.
You never know what motivates you.
Always desire to learn something useful.
Well done is better than well said.
Either you run the day or the day runs you.
The diversity of the phenomena of nature is so great, and the treasures hidden in the heavens so rich, precisely in order that the human mind shall never be lacking in fresh nourishment.