“Luck is a favorable thing out of an uncertainty. No such thing as luck when everything's certain.”
“Luck favors the prepared”
“Some people have luck, and everything comes out right with them; others have none, and never a thing turns out fortunately.”
“There's no such thing as luck. Luck is where preparation meets opportunity.”
“There are rules to luck, not everything is chance for the wise; luck can be helped by skill.”
“The only sure thing about luck is that it will change. ”