A maddness most discreet, A choking gall and a preserving sweet.

[Byron]

"Love is a smoke made with the fume of sighs, Being purged, a fire sparkling in lovers' eyes, Being vexed, a sea nourished with lovers' tears. What is it else? A maddness most discreet, A choking gall and a preserving sweet."

William Shakespeare (1564 - 1616)
in Romeo & Juliet, Act1, Scene 1.