Full Idea
No sentence can be made up without at least one word which denotes a universal. ..Thus all truths involve universals, and all knowledge of truths involves acquaintance with universals.
Gist of Idea
Every sentence contains at least one word denoting a universal, so we need universals to know truth
Source
Bertrand Russell (Problems of Philosophy [1912], Ch. 9)
Book Reference
Russell,Bertrand: 'The Problems of Philosophy' [OUP 1995], p.53
A Reaction
Sounds right, and is a beautifully neat way of showing the connection between metaphysics and life.