What's this life for?

I am not on the quest to seek the answer for life, but it is sometimes in melancholic moments that you begin to think of life without what you have at that moment. If you're placed in a completely different place, situation or (theoretical physics people!) dimension ... How will you deal with it? How do you normally deal with new places, people and events/incidents?

What is the meaning of one's life? Their role in this world? Their job, work? How do you know that what you're living is what you're meant to live? Who decides what you're meant to do? There's no god (Yea yea! Don't start), and there is no higher power. Whatever exists is in front of you, surrounding you and observable, feel-able. There is a spoon, and there is no slow motion bullet dodging. This is life people, and I guess it's high time we all woke up to it.

Only a handful of people have managed to live a full life (whatever that is!), and I think the only reason for that is that all the other idiots had no clue what to do with their life. They either idled away, or are idling away. How do you know you weren't meant to idle away your life?

I need to get some sleep...

Edit: Here's someone I think found the meaning of his life: