In the past, the circle and a perfectly round sphere tended to be seen as symbols of utmost purity and had the meaning of ‘infinity’ attached to them. But life is about being born and dying, to which cell division is central. Division takes place, which means growth. And for a form it is essential to have the possibility of change, to show development.
Life forms touch on the moment when the pressure within a sphere is not constant. At that moment, the sphere is no longer perfectly round, but rather egg-shaped. Compare this to the slightly oblate shape of planet earth. A bulge might emerge from the sphere, like a mountain being formed when pressure becomes too strong on a certain spot and the earth emits magma. Similarly, a glass sphere will form bulges as soon as the glassblower increases the pressure; the soap bubble in which the pressure becomes too high will burst.