Simply put, every thing (and grouping of things up and down the scale of size) is more or less alive depending on the order / configuration within itself and in relation to the things surrounding it. So a door can be more or less alive, taken by itself or taken in context of the wall, floor, and ceiling around it (and so on). Or compare a city with no sidewalks, completely paved with concrete, all buildings identical, square grid streets, no plant life whatsoever to some of the great cities in Europe which organically grew according to the needs of the populace over time. Can't you say one is literally more alive than the other, both the physical city itself as well as its inhabitants?
Since adopting this perspective, I've been able to make great strides in improving the order of my home which has resulted in an increase in well-being and mental health. The house is more alive and so I'm more alive for it, and vice versa, and so the positive feedback cycle continues.
He goes into great depth identifying principles we see occurring in nature to help define this gradient of liveliness and analyzes countless examples of great works of art from human history. He also shows how to bring such life to the world around you and in the things you make. Check it out. :)