[acjohnson55]

To me, probability is hard and unblinking. It's like the roulette wheel--nothing you can (legally) do changes the odds. Luck has an element of humanness to it. Keep working at it, and you'll eventually get lucky, and such. I think it combines the concept of uncertainty with the actions you take in hopes of a good outcome.

Of course, not all actions are meaningful in increasing your chance of success. Truly lucky people are constantly seeking advantage, not wasting time with superstition.