DUKE: And what’s her history?
VIOLA: A blank, my lord. She never told her love,
But let concealment, like a worm i’ the bud,
Feed on her damask cheek: she pined in thought,
And with a green and yellow melancholy
She sat like patience on a monument,
Smiling at grief. Was not this love indeed?

– William Shakespeare

Twelfth Night, Act 2, Scene 4. Viola (disguised as Cesario) tells Orsino the story of her father’s daughter who had a secret love. Of course the daughter is actually Viola and the secret love is Orsino.