To know oneself, one should assert oneself.
Well done is better than well said.
Be gentle to all and stern with yourself.
Expect problems and eat them for breakfast.
Without hard work, nothing grows but weeds.
Things do not happen. Things are made to happen.
What you do today can improve all your tomorrows.
If you can dream it, you can do it.
Go for it now. The future is promised to no one.
The dog that trots about finds a bone.
The whole essence of good drawing - and of good thinking, perhaps - is to work a subject down to the simplest form possible and still have it believable for what it is meant to be.