The mosaic of moments
I didn't understand this until I started keeping the small ones. McFlurries in the trunk after karate. "Da Da, I love you" from the carseat, unprompted. A meltdown I sat all the way through instead of ending. The morning my son tried to turn a goodbye into a group hug—holding his Mickey with one arm and reaching for me with the other.
Not one of those was a milestone. Together they are the whole picture.
That's the part I want you to have. You don't get to lift a tile back out once it's set; what's done is in the mosaic for good. But the next one is always in your hand. A life doesn't turn on the few big days everyone photographs—it's built out of the ordinary ones, the random Tuesdays, and the picture only shows itself once you're far enough back to see what all those small, chosen tiles were making.