The Only Secure Knowledge Is That I

Because Reason...is The Only Thing That Makes Us Men, And Distinguishes Us From The Beasts, I Would Prefer To Believe That It Exists, In Its Entirety, In Each Of Us.

The First Precept Was Never To Accept A Thing As True Until I Knew It As Such Without A Single Doubt.

Whatever I Have Up Till Now Accepted As Most True And Assured I Have Gotten Either From The Senses Or Through The Senses. But From Time To Time I Have Found That The Senses Deceive, And It Is Prudent Never To Trust Completely Those Who Have Deceived Us Even Once.

The Senses Deceive From Time To Time, And It Is Prudent Never To Trust Wholly Those Who Have Deceived Us Even Once.

In Philosophy, When We Make Use Of False Principles, We Depart The Farther From The Knowledge Of Truth And Wisdom Exactly In Proportion To The Care With Which We Cultivate Them, And Apply Ourselves To The Deduction Of Diverse Consequences From Them, Thinking That We Are Philosophizing Well, While We Are Only Departing The Farther From The Truth; From Which It Must Be Inferred That They Who Have Learned The Least Of All That Has Been Hitherto Distinguished By The Name Of Philosophy Are The Most Fitted For The Apprehension Of Truth.