To feel most beautifully alive means to be reading something beautiful, ready always to apprehend in the flow of language the sudden flash of poetry.

Holmes links the sensation of being “most beautifully alive” to an act of attentive reading. Life feels richest, he suggests, when the mind is actively receptive—“ready always to apprehend”—to the unexpected intensities that language can deliver. The “flow of language” implies ordinary continuity (sentences, narrative, argument), while the “sudden flash of poetry” names those moments when words ignite into heightened perception: an image, cadence, or insight that briefly transforms experience. The quote elevates reading from passive consumption to a disciplined openness, where beauty is not merely encountered but recognized in an instant of alert understanding.