Merging onto a motorway terrified you once. Mirrors checked in a panic, hands high on the wheel, entirely certain of imminent disaster.
Now you do it while continuing a conversation about something else.
Nobody has a memory of the day that changed. There wasn't one. Confidence accumulated in unnoticeable amounts across dozens of unremarkable journeys.
Whatever frightens you at the moment is on the same schedule. Not a breakthrough — an accumulation, invisible daily, obvious in a year. Which means today's contribution is supposed to feel like nothing much. That is the correct sensation for a process that is working.