Johannes Kepler

Truth is the daughter of time, and I feel no shame in being her midwife.

The squares of the periodic times are to each other as the cubes of the mean distances.

I demonstrate by means of philosophy that the earth is round, and is inhabited on all sides; that it is insignificantly small, and is borne through the stars.

Be kind and considerate with your criticism... It's just as hard to write a bad book as it is to write a good book.

We define ourselves as intelligent. That's odd, because we're doing the definition - We're creating our own definition and saying, 'We are intelligent!'

Michelle Obama has gone from political skeptic to political partner to a woman with a White House agenda of her own, and an approval rating higher than the president's.