Well, logos is science or reason, something that helps us to function practically and effectively in the world, and it must therefore be closely in tune and reflect accurately the realities of the world around us.

Armstrong is explaining the classical Greek notion of logos as a mode of rational, practical knowing—reasoned discourse, analysis, and “how-to” intelligence that enables effective action in the world. By stressing that logos must “reflect accurately the realities” around us, she contrasts it with other ways of apprehending meaning (often paired in her work with mythos), which may convey value, purpose, or existential insight without being empirically testable. The significance is a caution against confusing categories: treating symbolic or spiritual narratives as if they were scientific descriptions, or expecting science alone to answer questions of meaning. Logos, on this view, is indispensable but limited to what can be made coherent, verifiable, and operational.