We do not ask for what useful purpose the birds do sing, for song is their pleasure since they were created for singing. Similarly, we ought not to ask why the human mind troubles to fathom the secrets of the heavens... The 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 for fresh nourishment.
Temporis filia veritas; cui me obstetricari non pudet. Truth is the daughter of time, and I feel no shame in being her midwife.
We ought not to ask why the human mind troubles to fathom the secrets of the universe. The diversity of the phenomena of nature is so great, and the treasures hidden in the skies so rich, precisely in order that the human mind shall never be lacking in fresh nourishment.
Geometry has two great treasures; one is the Theorem of Pythagoras; the other, the division of a line into extreme and mean ratio. The first we may compare to a measure of gold; the second we may name a precious jewel.
I used to measure the skies, now I measure the shadows of Earth. Although my mind was sky-bound, the shadow of my body lies here. [Epitaph he composed for himself a few months before he died]
Discover the force of the skies O Men: once recognised it can be put to use.
After the birth of printing books became widespread. Hence everyone throughout Europe devoted himself to the study of literature... Every year, especially since 1563, the number of writings published in every field is greater than all those produced in the past thousand years. The Paracelsians have created medicine anew and the Copernicans have created astronomy anew. I really believe that at last the world is alive, indeed seething, and that the stimuli of these remarkable conjunctions did not act in vain.
Priusquam autem ad creationem, hoc est ad finem omnis disputationis, veniamus: tentanda omnia existimo. However, before we come to [special] creation, which puts an end to all discussion: I think we should try everything else.
I much prefer the sharpest criticism of a single intelligent man to the thoughtless approval of the masses.
I demonstrate by means of philosophy that the earth is round, and is inhabited on all sides; that it is insignificantly small, and is borne through the stars.
The squares of the periodic times are to each other as the cubes of the mean distances.
Truth is the daughter of time, and I feel no shame in being her midwife.
The 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.