Rupert Sheldrake said,

"An on-going system of habits, built up through the past, and what's happened in the past. And habits have a certain density, I mean, matter is, in a sense, dense because it is so deeply habitual. There's a sense in which habits are the basis of the kind of density of the sheer materiality of the natural world, its sheer resistance to the imagination, the fact that everything is so deeply embedded in habit. And then, left to themselves of course, habits would just fossilize, and the whole world would just become intensely, repetitively habitual. But they can't be left to themselves because there is another active process going on, which is the cosmological expansion, associated with the continued presence of chaos within the universe, which means that habits are permanently, or all the time, or at least intermissibly being interrupted by asteroids hitting the earth, Or, as we see in our own lives, our habits are being permanently being disrupted by unexpected accidents. This creates new conditions, new possibility, new vacuums where things can happen."