Here is another quotation that I found today that can be contrasted with the Kingsley Martin quote:
this transformation of love is quite possible.
What paralyzes life is failure to believe
and failure to dare.
The day will come when,
after harnessing space,
we shall harness for God the energies of love.
And, on that day, for the second time
in the history of the world,
we shall have discovered fire.
It is be Teilhard de Chardin from his 'Meditation'