This seems impossible. If you respect those who "can be of no possible value" to you, and this causes others to hold you in higher regard, and if the esteem of others confers any value to you, then those you respected were valuable to you in that way.
It might be more accurately rephrased as "can confer no interpersonal advantage on him."
Or perhaps ". . . no possible worth to him other than the satisfaction of having upheld his values."
This is our monthly thread for collecting these little gems and pearls of wisdom, rationality-related quotes you've seen recently, or had stored in your quotesfile for ages, and which might be handy to link to in one of our discussions.