‘Tis in my memory lock’d,
And you yourself shall keep the key of it.

– William Shakespeare

Hamlet, Act 1, Scene 3. Ophelia assures Laertes that she will follow his advice after he counseled her to spurn the romantic advances of Hamlet and not give up her virginity – “chaste treasure” – to him. The theme of male control comes across strongly in Ophelia’s words. She paints a metaphorical image of handing her brother the keys to her mind and memory.