Opportunity.

Opportunity. It affects you every day. Every single day.

Opportunity - a possibility due to a favorable combination of circumstances.
Ahhh lot's of big words right? Pretty much what I take away from that is an Opportunity is something life throws at you and you do or you don't. There is no in between. You either seize the day and you make something of it or you let the opportunity pass you and continue to live your life unaffected.
"Carpe Diem" Seize the day. Buy the t-shirt. Get the bumper sticker.

When life gives you lemons, you make lemonade. Really? That's ingenious.
Or do you go by Forgetting Sarah Marshall,
"When life gives you lemons, just say "Fuck the lemons" and bail."

But really use what your given, to make the most of what you've got. When you get an opportunity offered your way, use it. Don't abandon it. Someone says to you,"Hey, I'm going on a road trip to China, keen?"
What do you say? You've been offered the opportunity of a lifetime. Do you turn it down? Do you continue your studies? Do you continue your apprenticeship? Do you continue your job?

Or maybe, you bail. You go to China. You have a terrible time, everything sucks. It takes you too long to get there, you have to sleep on the streets, you come home sad, angry and embarrassed. People don't understand you for going, people laugh at you, they think your a moron. But you had an experience unlike no other. An experience you will never forget. For now, yes, you may be pissed off and angry for going but if you can look back and laugh about the whole situation then wasn't it worth it? You traveled, you went somewhere, you DID something.

When you turn down an opportunity, you never know exactly what you could be missing out on. Transformers quote: "10 years from now don't you want to be able to say you had the guts to get in the car?" You turn down the slightest opportunity could have you missing out on a great adventure, a great story and in general a great time.