The world is moving so fast these days that the man who says it can't be done is generally interrupted by someone doing it.
Harry Emerson Fosdick
Experience is what you get when you don't get what you want.
Even if you are on the right track, you'll get run over if you just sit there
The pursuit of perfection is frustrating and a waste of time because nothing is ever perfect.
The pursuit of excellence is commendable and worth while.
Therefore strive for excellence, not perfection