How I Met Your Mother, Season 4

Future Ted:
The great moments of your life won't necessarily be the things you do. They'll also be the things that happen to you. Now, I'm not saying you can't take action to affect the outcome of your life. You have to take action. And you will! But never forget, that on any day, you could step out the front door, and your whole life could change forever. You see the Universe has a plan kids; and that plan is always in motion. A butterfly flaps its wings, and it starts to rain. It's a scary thought, but it's also kind of wonderful. All these little parts of the machine constantly working... Making sure that you end up exactly where you're supposed to be.. exactly when you're supposed to be there. The right place. At the right time.