Where Both Are Friends, It Is Right

I Do Not Know What I May Appear To The World, But To Myself I Seem To Have Been Only A Boy Playing On The Seashore.

One [method] Is By A Watch To Keep Time Exactly. But, By Reason Of The Motion Of The Ship, The Variation Of Heat And Cold, Wet And Dry, And The Difference Of Gravity In Different Latitudes, Such A Watch Hath Not Yet Been Made.

To Derive Two Or Three General Principles Of Motion From Phænomena, And Afterwards To Tell Us How The Properties And Actions Of All Corporeal Things Follow From Those Manifest Principles, Would Be A Very Great Step In Philosophy.

If I Have Seen Further Than Others, It Is By Standing Upon The Shoulders Of Giants.

I Shall Not Mingle Conjectures With Certainties.