“Enthusiasm makes the difference.”

This quote implies that when you have a positive attitude then everything can be or turn out much better. For example if you are having a bad day but you have a positive attitude then you will always stay a winner to you. There will always be obstacles but you have to overcome them with a good attitude. Let's say you are gonna be in a soccer game and you don't have the enthusiasm of playing. And you are are not in the mood then there is a high chance that you will mess up the game for the team. Your attitude is always gonna determine how things go for you.