This from Jack London

You can’t wait for inspiration. You have to go after it with a club.

And speaking of Jack London, check out this Credo, believed to have been written – and believed and lived – by Jack London…

I would rather be ashes than dust!
I would rather that my spark should burn out
in a brilliant blaze than it should be stifled by dry-rot.
I would rather be a superb meteor, every atom
of me in magnificent glow, than a sleepy and permanent planet.
The function of man is to live, not to exist.
I shall not waste my days trying to prolong them.
I shall use my time.