As you get older and perhaps a little wiser (or in my Dad's case, sillier, much, much sillier-it can go both ways) you start to realise what really matters in life.
I think having kids can do that to you, that whirlwind of new love for the kid you made merged with the mammoth overwhelming weight of responsibility (no more spontaneity in life is pretty sobering) and puts everything that came before, and after it, into sharp perspective.
You don't need to have a kid for this I should add. Yay for being wiser without having to actually use your cervix! Life experience, travel, pets, nurturing plants, charity work, whatever it is that takes you out of yourself, can be enlightening,
It got me thinking about all the tiny touching moments that make up the bigger picture, the intricately woven happy-making little things I reflect on right before I go to sleep or if I'm away from my kids, missing them madly, or my zone out to more joyous times when I find the children fighting over toys/films/my affection and I need a happy place pronto.