"Opportunity is missed by most people because it is dressed in overalls and looks like work."- Thomas Edison
I think he is saying that even if you have to work for it, opportunity will still be there.
"The first steps to getting things you want out of life is this: Decide what you want."- Ben Stein
I think that he is trying to say that making up your mind will help get you through life.
I think that the first quote is more meaningful to me. I'm not completely sure why but I think that it is because work gets you to good things.