Poor human beings will never be able to travel with the rapidity of sound.
"These suns travel like ours towards the unknown with giddy flight, but they are so distant that three or four thousand years may pass without man being aware that they have moved more than a finger's breadth.

The distances of infinity are maddening.

The sun is a nebula of inflammatory gas, and the earth an imperceptible molecule of sand.
"The luminous ray of the Polar star requires half a century to reach our eyes; it might have disappeared forty-nine years ago, and still we should see it in space.
"And all these worlds are created, grow and die like human beings.
In space there is no more rest than on earth.

Some stars are extinguished, others vary, and others shine with all the power of their young life.

The dead planets dissolved by fires furnish the material for new worlds; it is a perpetual renewal of forms, throughout millions and millions of centuries, that represent in their lives what the few dozen years to which we are limited, are in our own.