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

In the spiritual life, as in all organic processes, everyone has their optimum and it is just as harmful to go beyond it as not to attain it.

What paralyzes life is lack of faith and lack of courage. The difficulty lies not in solving problems but in expressing them correctly; and we can now see that it is biologically undeniable that unless we harness passion to the service of spirit there can be no progress. Sooner or later, then, and in spite of all our incredulity, the world will take this step — because the greater truth always prevails and the greater good emerges in the end. The day will come when, after mastering the ether, the winds, the tides, gravity, we shall master the energies of love, for God. And then, for the second time in the history of the world, man will have made fire his servant.

However convergent it be, evolution cannot attain to fulfilment on earth except through a point of dissociation.
With this we are introduced to a fantastic and inevitable event which now begins to take shape in our perspective, the event which comes nearer with every day that passes: the end of all life on our globe, the death of the planet, the ultimate phase of the phenomenon of man.