The observer of Nature makes a third discovery. Every fresh cycle of life is characterised by an advance on the preceding cycle; every stage brings the end nearer. This represents progress, and it is seen everywhere; when it does not appear, it is because our limited vision cannot pierce its veil. Minerals slowly develop in the bowels of the earth, and miners well know when the ore is more or less "ripe,"[45] and that certain portions, now in a transition stage, will in a certain number of centuries have become pure gold; experiments[46] have proved that metals are liable to "fatigue" from excessive tension; and that, after a rest, they acquire greater power of resistance than before; magnets "are fed," _i.e._, they increase their power of attraction, by exercise; cultivation improves and sometimes altogether transforms certain species of vegetables; the rapid mental development of domestic animals by contact with man is a striking instance of the heights to which progress may attain when it is aided, whilst the influence of teaching and education on the development of individuals as well as of races is even more striking.[47] THE GOAL OF EVOLUTION. _The Formation of Centres of Consciousness that become "Egos."_ Through innumerable wanderings this general progress traces a clear, unwavering line. Those capable of following evolution on the planes of finer matter at once perceive, as it were, wide-spreading centres forming in the sea of divine Essence, which is projected by the Logos into the Universe. As the ages pass, these centres are sub-divided into more restricted centres, into clearer and clearer "blocks" in which consciousness, that is, the faculty of receiving vibrations from without, is gradually developed, and when this consciousness within them reaches its limit, they begin to differentiate from their surroundings, to feel the idea of the "I" spring up within them. From that time, there is added to the power of receiving vibrations consciously, that of generating them voluntarily; no longer are they passive centres, but rather beings that have become capable of receiving and giving freely, individualities recognising and affirming themselves more day by day; "I's," who henceforth regard themselves as separated from the rest of the Universe; this stage is that of the Heresy of Separateness. Regarding this heresy, however, one may well say: _Felix culpa._