Our century is probably more religious than any other. How could it fail to be, with such problems to be solved? The only trouble is that it has not yet found a God it can adore.

The most satisfying thing in life is to have been able to give a large part of one's self to others.

Individual human beings are so subtly developed through the centuries that it is strictly impermissible to compare any two men who are not contemporaries-that is to say are taken from two quite different times.

No one can deny that a network (a world network) of economic and psychic affiliations is being woven at ever increasing speed which envelops and constantly penetrates more deeply within each of us. With every day that passes it becomes a little more impossible for us to act or think otherwise than collectively.

Your creatures can come into being only, like shoot from stem, as part of an endlessly renewed process of evolution.

The truth is, indeed, that love is the threshold of another universe.

The age of nations has passed. Now, unless we wish to perish, we must shake off our old prejudices and build the Earth. The more scientifically I regard the world, the less can I see any possible biological future for it except in the active consciousness of its unity.