One of the first things I tried to instill in my economics students is this concept of being "finite."
You are going to die. You will end. You get one shot at this and thus;
Time is literally your only asset.
How you choose to spend your time is what will largely determine whether you lead a full and accomplished life...or whether you piss it away watching TV, saying no to dates. saying no to dances, rearing children, not trying new things or staying at home because you're too afraid to go out and live life.
But this is just an inexcusable and pathetic waste of a precious resource;