Milo settled into our life quickly. He learned the rituals of home — the click of the leash, the way evening light pooled on the floor. He also kept watch in small, remarkable ways: pausing at alleys on our walks, tilting his head as if listening for the city’s hidden stories. People would stop when they saw him, call him brave, pat his head. I would tell them how he’d stolen my purse only to lead us to something that mattered far more than anything in a wallet.

If there is a single thing that afternoon taught me, it is this: attention costs so little and can do so much. We might stroll through our days thinking the homeless are invisible, that a stray dog is merely a nuisance, that danger only exists on the fringes. But sometimes the universe picks the smallest messenger — a mangy dog with bright eyes — to jolt us awake. He didn’t just bring my purse back. He guided us toward a life that needed saving.

Now, when Daniel and I sit on the park bench beneath the sycamore, Milo at our feet, I always slow my steps a little more. The world hums on: kids still dash through the grass, coffee cups warm hands, and alleys still hold secrets. But knowing that a life can turn on a single bark, a single small insistence, has changed the way I move through the city. We are, all of us, responsible for noticing.