How I Met Your Mother, Season 4
Lily: Ted, why do u even want it(to be an architect)
Ted: Because I have to be an architect, that's the plan.
Lily: Screw the plan. I planned on being a famous painter, Marshall planned on being a environmentalist, Robin planned on being a famous tv presenter, Barney planned on being a violinist. (Background to the show: none of them are what they planned.)
Lili: Look, you can't design your life like a building. It doesn't work that way. You just have to live it and it will design itself.
Ted: So what, I just do nothing?
Lily: No, listen to what the world is telling you to do and take the leap.
Some might say we have to pursue our dreams. Whatever it takes. We should go for it. But sometimes... things doesn't go as planned and we just have to go with it and not dwell on what is not meant to be. That leap might not be towards something that you want but who knows... it might exactly be what you need.
To quote The Rolling Stones,
"You can't always get what you want, But if you try sometimes you just might find, you get what need".