The word ‘amateur’ comes from the Latin root meaning ‘to love.’ The conventional interpretation is that the amateur pursues his calling out of love, while the pro does it for money. Not the way I see it. In my view, the amateur does not love the game enough. If he did, he would not pursue it as a sideline, distinct from his ‘real’ vocation.

The professional loves it so much he dedicates his life to it.