Full Idea
We can still say revealing things about truth, by relating it to other concepts like belief, desire, cause and action.
Gist of Idea
We can elucidate indefinable truth, but showing its relation to other concepts
Source
Donald Davidson (The Folly of Trying to Define Truth [1999], p.21)
Book Reference
Davidson,Donald: 'Truth, Language and History' [OUP 2005], p.21
A Reaction
The trickiest concept to link it to is meaning. I think Davidson's view points to the Axiomatic account of truth, which flourished soon after Davidson wrote this. We can give rules for the correct use of 'true'.