To know oneself, one should assert oneself.
The dog that trots about finds a bone.
Without hard work, nothing grows but weeds.
If you're going through hell, keep going.
It's always too early to quit.
If you've got a talent, protect it.
Be thine own palace, or the world's thy jail.
Be kind whenever possible. It is always possible.
Leap, and the net will appear.
You never know what motivates you.
The answer to old age is to keep one's mind busy and to go on with one's life as if it were interminable. I always admired Chekhov for building a new house when he was dying of tuberculosis.