In youth the animal or bird quality begins to show, and that again demonstrates the continuity of the same process, the process of the angelic sphere, of the jinn plane, and of the physical world. With age it is again the same process, but the other way round: first the vegetable kingdom begins to show, a person becomes milder, more gentle, thoughtful, and considerate, just like trees compared with rocks. And as one advances so one comes closer to the mineral kingdom; then a certain exclusiveness, a remoteness, a wish for retirement, a love of solitude develop which are all qualities of the mineral kingdom.