It is striking how history, when resting on the memory of men, always touches the bounds of mythology. – Leopold von Ranke, History of the Popes

It has become too easy to see that the luckless men of the past lived by mistakes, even absurd beliefs, so we may well fail in a decent respect for them, and forget that historians of the future will point out that we too lived by myths. – Herbert J. Muller, Freedom in the Western World

The history of astronomy is a history of receding horizons. – Edwin Powell Hubble