Going through the pain barrier, that’s what makes the muscles grow. There’s this pain, this aching, and going on and on and on. That’s what divides a champion from a non-champion - having the guts to go through the pain barrier.
There are two men inside the artist, the poet and the craftsman. One is born a poet. One becomes a craftsman.Émile Zola, Letter to Paul Cézanne (16 April 1860)