How does Michelle Duggar stay so calm and centered?

Here's a clip of a Today show interview with Jim Bob and Michelle Duggar, just days after their 18th child was born.

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You know, I kinda like the Duggars. I'm amazed at how articulate some of the younger ones are. They really do seem to be a sweet family.

But how does Michelle stay so calm and centered with all those kids? She just had her 18th child, and she looks like she got a full body massage!

I think I'll just buy their book and find out for myself...I just got a 40% off coupon from Border in my inbox. I may just use it on that.