A couple of weeks ago, I took my son to a park with a small stage, maybe a meter high. He saw kids running and tumbling up there, and he wanted to join. Since he didn't know any of them and they were all older, they weren't interested in him, so I got closer and asked him to jump. With little hesitation, he did, straight into my hands. I took half a step back. He jumped again. Full step back. Again. We did this about forty times until he was tired and thirsty.

He came over for water. I handed him the flask, and while I was putting it back into the backpack, I caught him in the corner of my eye already sprinting back toward the edge. Full speed, no checking whether I was ready. I dropped everything and caught him. He thought it was the funniest thing that had ever happened.

It took forty jumps to decide not to question me. The decision had moved from his head to his body. He didn't look for my hands. He just ran and launched.

Yesterday we went to the pool. It was too deep for him. He had swimming floats on but he was terrified. He clung to me like a small monkey for about fifteen minutes, arms locked around my neck, legs wrapped around my ribs. I couldn't peel him off.

Then slowly, gradually, I got him to the shallow edge where water was knee deep. His knee deep. I asked him to jump to me in the water. He did. We did it again. Then I put him on the side of the pool and asked him to jump from there. The same kid who'd been clinging to me in fear of the water threw himself off the edge without hesitation, with the biggest smile you can imagine. The water was still scary. I wasn't.

My dad told me I used to do the same thing to him. We had bunk beds, and he'd put me on the top one and say, "Jump". And I would. No pause, no calculation. Just a kid throwing himself into the air because the person below had never not caught him.

Three versions of the same moment across three generations. Nobody taught anyone how to do this. My father didn't read a book about building trust with children. I didn't plan the forty jumps at the park. It just happened because showing up and catching became the pattern, and the pattern became something the body stopped questioning.

That's how trust actually gets built. Through repetition so consistent that the conscious mind stops being involved. You don't decide to trust someone you've been caught by four hundred times. You just jump. The way you don't decide to trust a chair you've sat in every day for a year. Your body knows before your mind gets a vote.

I keep thinking about when that stops. Because every adult used to be the kid who ran full speed off a stage without looking. At some point we started checking. Measuring the distance, calculating whether the hands would be there. We learned to hesitate before jumping because at some point, in some version of this, the hands weren't there. Or they were there but they let us fall in a way that wasn't physical. A promise that didn't hold up, or a person who was present but unreliable.

You don't need to be dropped to stop jumping. You just need enough inconsistency to move the decision back from your body to your head. Once it's in your head, the calculation starts. And once the calculation starts, you never jump the same way again.

My son doesn't calculate yet. He runs and launches because forty catches built something that forty conversations never could. The water was terrifying and he still jumped, because the scary thing and the trusted thing were separate, and the trusted thing won.

I don't know how long that lasts. I don't know when the world starts teaching him to check before he jumps. But I know what my job is right now. Keep catching. Make the pattern so deep that when the day comes when he has to jump, and he's not sure, his body remembers what his mind has started to doubt.