"Do not breed. Nothing gives less pleasure than childbearing. Pregnancies are damaging to health, spoil the figure, wither the charms, and it's the cloud of uncertainty forever hanging over these events that darkens a husband's mood."

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Oh, my dear Kepler, how I wish that we could have one hearty laugh together. Here, at Padua, is the principal professor of philosophy, whom I have repeatedly and urgently requested to look at the moon and planets through my glass, [telescope] which he pertinaciously refuses to do. Why are you not here? what shouts of laughter we should have at this glorious folly! and to hear the professor of philosophy at Pisa laboring before the grand duke with logical arguments, as if with magical incantations, to charm the new planets out of the sky.

— Galileo Galilei