The day is not far distant when humanity will realize that biologically it is faced with a choice between suicide and adoration.

We are not human beings having a spiritual experience; we are spiritual beings having a human experience.

The phrase 'Sense of the Earth' should be understood to mean the passionate concern for our common destiny which draws the thinking part of life ever further onward. The only truly natural and real human unity is the spirit of the Earth. . . .The sense of Earth is the irresistable pressure which will come at the right moment to unite them (humankind) in a common passion.The Age of Nations is past. The task before us now, if we would not perish, is to build the Earth.

Do not forget that the value and interest of life is not so much to do conspicuous things...as to do ordinary things with the perception of their enormous value.

It is not our heads or our bodies which we must bring together, but our hearts. . . . Humanity. . . is building its composite brain beneath our eyes. May it not be that tomorrow, through the logical and biological deepening of the movement drawing it together, it will find its heart, without which the ultimate wholeness of its power of unification can never be achieved?

The world is round so that friendship may encircle it.

The stars are laboratories in which the evolution of matter proceeds in the direction of large molecules.