Illusory Joy Is Often Worth More Than

Everybody Thinks Himself So Well Supplied With Common Sense That Even Those Most Difficult To Please. . . Never Desire More Of It Than They Already Have.

Neither Divine Grace Nor Natural Knowledge Ever Diminishes Freedom.

Mathematics Is A More Powerful Instrument Of Knowledge Than Any Other That Has Been Bequeathed To Us By Human Agency.

Each Problem That I Solved Became A Rule, Which Served Afterwards To Solve Other Problems.

The Reading Of All Good Books Is Like A Conversation With The Finest Minds Of Past Centuries.