"I have been a father, and I have rejoiced in my children."

"Provide ship or sails adapted to the heavenly breezes, and there will be some who will not fear even that void [of space]… . So, for those who will come shortly to attempt this journey, let us establi…"

"I have been a fool, but I have learned from my folly."

"I am a Lutheran astrologer, I throw away the nonsense and keep the hard kernel."

"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."