If God himself has waited six thousand years for someone to contemplate his works, my book can wait for a hundred.
Johannes KeplerWhen ships to sail the void between the stars have been built, there will step forth men to sail these ships.
Johannes KeplerThe diversity of the phenomena of nature is so great, and the treasures hidden in the heavens so rich, precisely in order that the human mind shall never be lacking in fresh nourishment.
Johannes Kepler