The very commerce of all words, The heart's deep bearing well affords.

This couplet beautifully contrasts words spoken out of politeness or agreement, like a "yes, yes" transaction, with those that truly spring from the heart. It highlights how often we engage in the 'business' of simply agreeing or flattering others. But the real depth and meaning are found in words that are sincerely held and expressed from our innermost feelings. It reminds us to value genuine sentiment over superficial pleasantries, emphasizing that true connection comes from heartfelt honesty, not just agreeable responses.