You're always struggling because you're not playing on a...

You're always struggling because you're not playing on a 53-and-a-third by a 120-yard field. You're not playing on a baseball diamond. With golf, every field is different and every atmosphere is different. The grass is different. The weather is different. You're outside. You're not in a stadium. There are so many different variables, so you never master golf. So, I think good athletes like a challenge.