Eyesight should learn from reason.
Interpretation
This quote emphasizes the importance of using reason in our observation and understanding of the world.
Johannes Kepler asserts that our perception, represented by eyesight, should be guided by reason and rationality. This suggests that while we may observe the world around us visually, it is through logical thinking and reason that we can truly comprehend and learn from those observations.
In practice
In a philosophical debate about perception and reality.
...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.
I measured the skies, now the shadows I measure, Sky-bound was the mind, earth-bound the body rests. [Kepler's epitaph]
It may be well to wait a century for a reader, as God has waited six thousand years for an observer.
No alibi will save you from accepting the responsibility.
Trust your hunches... Hunches are usually based on facts filed away just below the conscious level.
I have been speculating last night what makes a man a discoverer of undiscovered things. As far as I can conjecture the art consists in habitually searching for the causes and meaning of everything which occurs.
We must not look at goblin men, We must not buy their fruits: Who knows upon what soil they fed Their hungry thirsty roots?
One whose knowledge is confined to books and whose wealth is in the possession of others, can use neither his knowledge nor wealth when the need for them arises.
Truth will rise above falsehood as oil above water.
Subscribe for the occasional hand-picked quote. No noise.