If I Am Anything, Which I Highly

The Best And Safest Way Of Philosophising Seems To Be, First To Enquire Diligently Into The Properties Of Things, And To Establish Those Properties By Experiences [experiments] And Then To Proceed Slowly To Hypotheses For The Explanation Of Them. For Hypotheses Should Be Employed Only In Explaining The Properties Of Things, But Not Assumed In Determining Them; Unless So Far As They May Furnish Experiments.

To Every Action There Is Always Opposed An Equal Reaction.

Do Not Bodies Act Upon Light At A Distance, And By Their Action Bend Its Rays; And Is Not This Action (caeteris Paribus) [all Else Being Equal] Strongest At The Least Distance?

Do Not Bodies And Light Act Mutually Upon One Another; That Is To Say, Bodies Upon Light In Emitting, Reflecting, Refracting And Inflecting It, And Light Upon Bodies For Heating Them, And Putting Their Parts Into A Vibrating Motion Wherein Heat Consists?

I Have Presented Principles Of Philosophy That Are Not, However, Philosophical But Strictly Mathematical-that Is, Those On Which The Study Of Philosophy Can Be Based. These Principles Are The Laws And Conditions Of Motions And Of Forces, Which Especially Relate To Philosophy.