One Man Alone Had Really

All Sciences Are Connected; They Lend Each Other Material Aid As Parts Of One Great Whole, Each Doing Its Own Work, Not For Itself Alone, But For The Other Parts; As The Eye Guides The Body And The Foot Sustains It And Leads It From Place To Place.

Argument Is Conclusive, But It Does Not Remove Doubt, So That The Mind May Rest In The Sure Knowledge Of The Truth, Unless It Finds It By The Method Of Experiment.

As Regards Authority I So Proceed. Boetius Says In The Second Prologue To His Arithmetic, 'if An Inquirer Lacks The Four Parts Of Mathematics, He Has Very Little Ability To Discover Truth.' And Again, 'without This Theory No One Can Have A Correct Insight Into Truth.' And He Says Also, 'i Warn The Man Who Spurns These Paths Of Knowledge That He Cannot Philosophize Correctly.' And Again, 'it Is Clear That Whosoever Passes These By, Has Lost The Knowledge Of All Learning.'

First, By The Figurations Of Art There Be Made Instruments Of Navigation Without Men To Row Them, As Great Ships To Brooke The Sea, Only With One Man To Steer Them, And They Shall Sail Far More Swiftly Than If They Were Full Of Men; Also Chariots That Shall Move With Unspeakable Force Without Any Living Creature To Stir Them. Likewise An Instrument May Be Made To Fly Withall If One Sits In The Midst Of The Instrument, And Do Turn An Engine, By Which The Wings, Being Artificially Composed, May Beat The Air After The Manner Of A Flying Bird.

[i]f In Other Sciences We Should Arrive At Certainty Without Doubt And Truth Without Error, It Behooves Us To Place The Foundations Of Knowledge In Mathematics, In So Far As Disposed Through It We Are Able To Reach Certainty In Other Sciences And Truth By The Exclusion Of Error.