The heavenly motions... are nothing but a continuous song for several voices, perceived not by the ear but by the intellect, a figured music which sets landmarks in the immeasurable flow of time.
Interpretation
Kepler suggests that the cosmic movements are like a complex symphony understood intellectually rather than auditorily.
In this quote, Johannes Kepler reflects on the idea that the motions of celestial bodies create a harmonious order that transcends mere physical sound. He likens these movements to a 'continuous song,' which, while not heard by the ears, is appreciated intellectually as a profound structure that provides a sense of orientation in the vastness of time and space. This highlights the beauty of the universe and encourages a deeper understanding of the cosmos beyond sensory perception.
In practice
In a lecture about the cosmos, one might quote Kepler to illustrate the beauty of the universe.
...Those laws are within the grasp of the human mind. God wanted us to recognize them by creating us after his own image so that we could share in his own thoughts... and if piety allow us to say so, our understanding is in this respect of the same kind as the divine, at least as far as we are able to grasp something of it in our mortal life.
A most unfailing experience... of the excitement of sublunary (that is, human) natures by the conjunctions and aspects of the planets has instructed and compelled my unwilling belief.
We find, therefore, under this orderly arrangement, a wonderful symmetry in the universe, and a definite relation of harmony in the motion and magnitude of the orbs, of a kind that is not possible to obtain in any other way.
I am stealing the golden vessels of the Egyptians to build a tabernacle to my God from them, far far away from the boundaries of Egypt. If you forgive me, I shall rejoice; if you are enraged with me, I shall bear it. See, I cast the die, and I write the book. Whether it is to be read by the people of the present or of the future makes no difference: let it await its reader for a hundred years, if God himself has stood ready for six thousand years for one to study him.
Eyesight should learn from reason.
I measured the skies, now the shadows I measure, Sky-bound was the mind, earth-bound the body rests. [Kepler's epitaph]
Thought is essentially practical in the sense that but for thought no motion would be an action, no change a progress.
Strapped, noosed, nighing his hour, He stood and counted them and cursed his luck; And then the clock collected in the tower Its strength, and struck.
The written word is weak. Many people prefer life to it. Life gets your blood going, & it smells good. Writing is mere writing, literature is mere. It appeals only to the subtlest senses—the imagination’s vision, & the imagination’s hearing—& the moral sense, & the intellect. This writing that you do, that so thrills you, that so rocks & exhilarates you, as if you were dancing next to the band, is barely audible to anyone else.
That your enemies have been created is God's doing; that they hate you and wish to ruin you is their own doing. What should you say about them in your mind? "Lord be merciful to them, forgive them their sins, put the fear of God in them, change them!" You are loving in them not what they are, but what you would have them to become.
History is the long struggle of man, by exercise of his reason, to understand his environment and to act upon it. But the modern period has broadened the struggle in a revolutionary way. Man now seeks to understand, and act on, not only his environment, but himself; and this has added, so to speak, a new dimension to reason and a new dimension to history.
The moon and sun are travelers through eternity. Even the years wander on. Whether drifting through life on a boat or climbing toward old age leading a horse, each day is a journey, and the journey itself is home.
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