The new key’s unfamiliar shape can make a new responsibility feel physically real.

A change stays abstract until something in your hand insists on it. You can sign, agree and announce, and none of it lands the way an object does when it does not yet fit smoothly in your pocket. The unfamiliar shape is the responsibility made physical, and it will stay strange for a few weeks and then stop being noticeable.

With something significant just started, let the physical part do some of the work. Carry the object, walk the route, use the new name out loud. And if the strangeness is uncomfortable, it is worth knowing that the discomfort has a short and predictable life.