Meaning of “If music be the food of love, play…”

Romeo and Juliet, Act 1, Scene 5.

Little Women, Chapter 24, “Gossip,” Project Gutenberg #514. The narrator says Meg has grown prettier than ever because “love is a great beautifier” while describing the three years before her wedding. This is literary narrator commentary about Meg’s happiness and maturation, not an empirical claim that affection produces a guaranteed physical effect.

Sonnet 43 from Sonnets from the Portuguese; the poem proceeds by describing multiple dimensions of love.

“Ode on a Grecian Urn,” in Keats: Poems Published in 1820; Project Gutenberg #23684. The line addresses figures represented on the urn and belongs to the poem’s meditation on art, imagination and permanence.

Emma, Volume III, Chapter XIII, scan-backed 1816 John Murray first edition on Wikisource. George Knightley tells Emma “If I loved you less, I might be able to talk about it more” during his declaration, explicitly contrasting the depth of his feeling with his difficulty making polished speeches.

Essays: First Series, “Friendship” (1841), verified against Project Gutenberg #2944 and the page-numbered 1907 Merrill/Turpin Essays witness in Project Gutenberg #16643, printed page 117. Emerson says “Our intellectual and active powers increase with our affection” before illustrating the claim with a scholar who finds thoughts and language when writing to a friend; it remains literary-philosophical observation rather than a quantified psychological law.