Love is quickest to detect failures
F.B. Meyer, in Love to the Uttermost: Expositions of John XIII - XXI, writes:
The highest love is ever quickest to detect that failures and inconsistencies of the beloved. Just because of its intensity, it can be content with nothing less than the best, because the best means the blessedest; and it longs that the object of its thought should be most blessed forever. It is a mistake to think that green-eyed jealousy is quickest to detect the spots on the sun, the freckles on the face, and the marring discords in the music of life; love is quicker, more microscopic, more exacting than the ideal should be achieved. Envy is content to indicate the fault, and leave it; but love detects, and waits and holds its peace until the fitting opportunity arrives, and then sets itself to remove, with its own tenderest ministry, the defect which had spoiled the completeness and beauty of its object.