Yoga in the park this morning was all about the spine. My soft-spoken teacher stretched and twisted and cooed us into shapes that make the back-body purr. The rising sun cast majestic shadows on the concrete of the pavilion. Shadows of my body, reaching and breathing into beautiful movement in the already-warm breeze of a Midwestern day in late summer.

This stretching reminded me that I am alive, like yoga always reminds me that I am alive. These shadows made me grateful. I am able-bodied. I am here. I am breathing. Imperfect and grieving and uncertain, yes; but also accepting and peaceful and hopeful that life might still bring me gifts. That I am deserving of those gifts.

The mantra of my first yoga teacher, more than two decades ago, was: “You are only as young as your spine is flexible.” I didn’t appreciate her mantra back then, because my spine was flexible. It was also young and supple and strong. I was in my early thirties. I did not yet know that my body would change and that life would make me rigid. Back then, I could still do flips in the backyard with my daughters, the muscle memory of competitive gymnastics still lithe in my muscles and bones.

Not so much today, now that I know the weight of living. In my fifties, I am starting over and feeling green, despite my graying hair. I am unbending, even though life has done its damnedest to bend me. I am strong, in spite of all I have endured. But I know all of this, and that is the difference. Knowing is what makes me flexible.

And this is, precisely, the point of yoga. To practice. To learn. To bend. Not just in body, but also in spirit. To remind us to breathe. To make us sit in our moment with all of the crap life heaps upon us. To witness our shadows. To know the beauty of our bodies to bend without breaking.

Sometimes, I think I am old and inflexible. But in reality, I am young and bendy. I am strong. I am human. I am flexible.