There is no way to success in art but to take off your coat, grind paint, and work like a digger on the railroad, all day and every day.
There is really no insurmountable barrier save your own inherent weakness of purpose.
Of all wit's uses, the main one is to live well with who has none.
All nobility in its beginnings was somebody's natural superiority.
Every man's Reason is sufficient for his guidance, if used.
All science has one aim, namely, to find a theory of nature.