I had 3 kids on the verge of turning 40 and I'm glad I did. I was more mature and had more wisdom. My career was established and stable. I was in a great position to have kids.

And, it's kept me younger. We have running competitions, weight lifting competitions, sports competitions. The days I could beat my kids at running are long gone. Now, one's about to beat me at weightlifting. It's really something beautiful about the human condition, watching your kids grow and slowly beat you at everything.

Raising kids is challenging at any age, but I can't think of a more perfect time in my life.