A Little Learning Is A Dangerous Thing

Cease To Be Ruled By Dogmas And Authorities; Look At The World!

But Concerning Vision Alone Is A Separate Science Formed Among Philosophers, Namely, Optics, And Not Concerning Any Other Sense ... It Is Possible That Some Other Science May Be More Useful, But No Other Science Has So Much Sweetness And Beauty Of Utility. Therefore It Is The Flower Of The Whole Of Philosophy And Through It, And Not Without It, Can The Other Sciences Be Known.

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.

There Are Two Modes Of Acquiring Knowledge, Namely By Reasoning And Experience. Reasoning Draws A Conclusion And Makes Us Grant The Conclusion, But Does Not Make The Conclusion Certain, Nor Does It Remove Doubt So That The Mind May Rest On The Intuition Of Truth, Unless The Mind Discovers It By The Path Of Experience.

There Are Four Great Sciences, Without Which The Other Sciences Cannot Be Known Nor A Knowledge Of Things Secured ... Of These Sciences The Gate And Key Is Mathematics ... He Who Is Ignorant Of This [mathematics] Cannot Know The Other Sciences Nor The Affairs Of This World.