Full Idea
I have not as yet been able to deduce from the phenomena the reason for the properties of gravity.
Gist of Idea
From the phenomena, I can't deduce the reason for the properties of gravity
Source
Isaac Newton (Principia Mathematica [1687], Bk 3 Gen Schol)
Book Reference
Newton,Isaac: 'Philosophical Writings' [CUP 2004], p.92
A Reaction
I take it that giving the reasons for the properties of gravity would be an essentialist explanation. I am struck by the fact that the recent discovery of the Higgs Boson appears to give us a reason why things have mass (i.e. what causes mass).