All Is To Be Doubted.

There Is Nothing So Far Removed From Us As To Be Beyond Our Reach, Or So Hidden That We Cannot Discover It.

I Should Consider That I Know Nothing About Physics If I Were Able To Explain Only How Things Might Be, And Were Unable To Demonstrate That They Could Not Be Otherwise.

For How Do We Know That The Thoughts Which Occur In Dreaming Are False Rather Than Those Others Which We Experience When Awake, Since The Former Are Often Not Less Vivid And Distinct Than The Latter?

Everything Is Self-evident.

Whenever Anyone Has Offended Me, I Try To Raise My Soul So High That The Offense Cannot Reach It.