HAMLET: Doubt thou the stars are fire;
Doubt that the sun doth move;
Doubt truth to be a liar;
But never doubt I love.
William Shakespeare (1564-1616) English dramatist and poet
Hamlet, Act 2, sc. 2, l. 124ff (2.2.124-127) (c. 1600)
(Source)
A letter from Hamlet to Ophelia, read by Polonius.