If it isn't my earliest memory, it must be at least one of the earliest.
It's night. The summer thunderstorm has waked me out of a sound sleep, and I'm sitting in bed crying, terrified. Our house is near the top of the hill, and the crash of the thunder and irregular strobe of lightning seem to come from all around.
The door opens, and my father comes in. He scoops me up into his arms. I have a distinct visual memory of moving from the darkness of my room, through the hall, and into the kitchen, where the lights are on.
My mother—entirely understandably—is saying: Russell, what are you doing? Russell, what are you doing?
Dad opens the back door and steps out into the rain, which is bucketing down. (We must both have been drenched to the skin in seconds, though I have no memory of it.) He snags a lawn chair in one hand, goes out to the center of the yard, and opens it. He sits down, and sets me in his lap.
The storm's initial front has moved on. Together we sit in the rain, listening to the grand rolls of thunder and watching the play of lightning on the horizon.
That's all I remember, but—as dad had intended—ever since then I've loved, not feared, the beauty and majesty of thunderstorms.
Some years ago, having belatedly had some experience in the field myself, my father and I were discussing the fine art of parenting. I cited this story as one of the wisest examples of creative, proactive parenting that I could think of.