"The satisfactions of manifesting oneself concretely in the world through manual competence have been known to make a man quiet and easy. They seem to relieve him of the felt need to offer chattering interpretations of himself to vindicate his worth. He can simply point: the building stands, the car now runs, the lights are on. Boasting is what a boy does, because he has no real effect in the world." Matthew Crawford
I'm reading Matthew Crawford's book The Case for Working with your Hands: or Why Office Work is Bad for us and Fixing Things Feels Good.
Crawford has followed an interesting career path; after getting his Ph.D from Chicago he went to work for a think tank, dissatisfied he quit in under a year to open a motorcycle repair shop. The book is his account of the value of working with your hands. The above paragraph stood out.
The sense of agency and control that comes with hand-on activities is the reason we do what we do.