Contempt for small beginnings is the most expensive emotion a builder can carry, because it stops the only process that works.
A plumb line checks one course of stone against true, today, and does nothing else. That is the whole mechanism by which a house rises: each course set within two millimetres carries the next, and forty courses later the small correction is a wall that holds weight.
Grading a foundation against the finished temple produces shame, shame loosens the grip on the line, and the work stops at the height that first looked unimpressive. Yahweh's eyes cross the whole earth and settle on a hand holding a level, which says plainly what is being weighed. Drop the daily alignment and the house stays the size a person was embarrassed by.