As a result, man is the only successful type which has remained as a single interbreeding group or species, and has not radiated out into a number of… - Pierre Teilhard de Chardin

In no case does the energy required for synthesis appear to be provided by an influx of fresh capital, but by expenditure.

So many things which once had distressed or revolted him — the speeches and pronouncements of the learned, their assertions and their prohibitions, their refusal to allow the universe to move — all seemed to him now merely ridiculous, non-existent, compared with the majestic reality, the flood of energy, which now revealed itself to him: omnipresent, unalterable in its truth, relentless in its development, untouchable in its serenity, maternal and unfailing in its protectiveness.

But this quantum only takes on its full significance when we try to define it with regard to a concrete natural movement — that is to say, in duration.