Every corporeal substance, so far forth as it is corporeal, has a natural fitness for resting in every place where it may be situated by itself beyon… - Johannes Kepler

But although the attractive virtue of the earth extends upwards, as has been said, so very far, yet if any stone should be at a distance great enough to become sensible compared with the earth’s diameter, it is true that on the motion of the earth such a stone would not follow altogether; its own force of resistance would be combined with the attractive force of the earth, and thus it would extricate itself in some degree from the motion of the earth.

I measured the skies, now the shadows I measure. Sky-bound was the mind, Earth-bound the body rests.

I especially love analogies, my most faithful masters, acquainted with all the secrets of nature… One should make great use of them.