“ A lover's ear will hear the lowest sound, When the suspicious head of theft is stopp'd. Love's feeling is more soft and sensible Than are the tender horns of cockled snails: Love's tongue proves dainty Bacchus gross in taste. ”
 William Shakespeare, Love's Labour's Lost (1598). copy citation

add

“Other slow arts entirely keep the brain; And therefore, finding barren practisers, Scarce show a harvest of their heavy toil; But love, first learned in a lady's eyes, Lives not alone immured in the brain, But with the motion of all elements Courses as swift as thought in every power, And gives to every power a double power, Above their functions and their offices. It adds a precious seeing to the eye: A lover's eyes will gaze an eagle blind. A lover's ear will hear the lowest sound, When the suspicious head of theft is stopp'd. Love's feeling is more soft and sensible Than are the tender horns of cockled snails: Love's tongue proves dainty Bacchus gross in taste. For valour, is not Love a Hercules, Still climbing trees in the Hesperides? Subtle as Sphinx; as sweet and musical As bright Apollo's lute, strung with his hair. And when Love speaks, the voice of all the gods Make heaven drowsy with the harmony.” source