Be gentle to all and stern with yourself.
If you're going through hell, keep going.
After a storm comes a calm.
Begin to be now what you will be hereafter.
Always desire to learn something useful.
The secret of getting ahead is getting started.
Either you run the day or the day runs you.
To know oneself, one should assert oneself.
If you've got a talent, protect it.
Know or listen to those who know.
A serious and good philosophical work could be written consisting entirely of jokes.