<<..where, in the space of values..>>

In the neighborhood of your inquiry might be 'to speak in measured words.'

But I wonder; since, generally speaking, value is quantitative and a category of measure, if your question doesn't really signal a being lost at sea in metaphor, 'value' and 'measure' deriving from each other but intended, in this space, to cast light on something else but not on each other.

Here, that something would seem to be the category of virtues, or qualities, ascribed to or discerned in individuals. Their abstraction to measure would both seems an act of observation and one of 'heirarchization' (what does it mean to say that one has more of this or that virtue than another?) and, since the same abstraction produces the moral shading, it is suggestive of some interesting deep-lying social structures.