Via Refdesk, my home page when I fire up the Internet, and drilling down to Thought of the Day for 10 Jan 2011:
"People always call it luck when you've acted more sensibly than they have." - Anne Tyler
This is along the same lines as reaping what you sow, or fortune smiles on the prepared. In Ultrarunning, that means to be prepared mentally and physically for all your races. You do your homework, you train, you crosstrain, you get your head into the course.
Then when race day comes, in the immortal words of Dr. George Sheehan, you "...look to the day when it all is suddenly as easy as a bird in flight."