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“The snake which cannot cast its skin has to die. As well the minds which are prevented from changing their opinions; they cease to be mind.”
― Friedrich Nietzsche

“Is man merely a mistake of God's? Or God merely a mistake of man?”
― Friedrich Nietzsche

“Exploration is in our nature. We began as wanderers, and we are wanderers still. We have lingered long enough on the shores of the cosmic ocean. We are ready at last to set sail for the stars.”
― Carl Sagan, Cosmos

“Never put off till tomorrow what may be done day after tomorrow just as well.”
― Mark Twain