To go up you have to go down first
To go up you have to go down first.
When a building is constructed, first the ground is excavated and they go down, and then they build it up. When excavation is happening, for people from far it looks like there is no progress as they cannot see anything above ground level. It is the same with humans too, when we are building our foundations, for people who don't see the depth, it looks like there is no progress.