Ships and sails proper for the heavenly air should be fashioned. Then there will also be people, who do not shrink from the dreary vastness of space.

A mind is accustomed to mathematical deduction, when confronted with the faulty foundations of astrology, resists a long, long time, like an obstinate mule, until compelled by beating and curses to put its foot into that dirty puddle.

Discover the force of the skies O Men: once recognised it can be put to use.

My greatest desire is that I may perceive the God whom I find everywhere in the external world, in like manner also within and inside myself.

Do we ask what profit the little bird hopes for in singing?

I had the intention of becoming a theologian...but now I see how God is, by my endeavors, also glorified in astronomy, for 'the heavens declare the glory of God.'

Nature uses as little as possible of anything.