Full Idea
In philosophy abstraction from the senses is required.
Gist of Idea
Philosophy must abstract from the senses
Source
Isaac Newton (Principia Mathematica [1687], Def 8 Schol)
Book Reference
Newton,Isaac: 'Philosophical Writings' [CUP 2004], p.66
A Reaction
He particularly means 'natural philosophy' (i.e. science), but there is no real distinction in Newton's time, and I would say this remark is true of modern philosophy.