For The Things Of This World Cannot

There Are In Fact Four Very Significant Stumbling Blocks In The Way Of Grasping The Truth, Which Hinder Every Man However Learned, And Scarcely Allow Anyone To Win A Clear Title To Wisdom, Namely, The Example Of Weak And Unworthy Authority, Longstanding Custom, The Feeling Of The Ignorant Crowd, And The Hiding Of Our Own Ignorance While Making A Display Of Our Apparent Knowledge.

There Are Four Chief Obstacles In Grasping Truth ... Namely, Submission To Faulty And Unworthy Authority, Influence Of Custom, Popular Prejudice, And The Concealment Of Our Own Ignorance Accompanied By An Ostentatious Display Of Our Knowledge.

For The Things Of This World Cannot Be Made Known Without A Knowledge Of Mathematics.

In The Mathematics I Can Report No Deficience, Except That It Be That Men Do Not Sufficiently Understand The Excellent Use Of The Pure Mathematics, In That They Do Remedy And Cure Many Defects In The Wit And Faculties Intellectual. For If The Wit Be Too Dull, They Sharpen It; If Too Wandering, They Fix It; If Too Inherent In The Sense, They Abstract It.

It Is Not Necessarily Impossible For Human Beings To Fly, But It So Happens That God Did Not Give Them The Knowledge Of How To Do It. It Follows, Therefore, That Anyone Who Claims That He Can Fly Must Have Sought The Aid Of The Devil. To Attempt To Fly Is Therefore Sinful.