In Shakespeare's "Hamlet," the quote "Tis in my memory lock'd, And you yourself shall keep the key of it," reflects the theme of memory and personal connection. It suggests that the speaker's thoughts or feelings are securely held within their mind, and only the addressed individual has the power to access them. This highlights the significance of relationships and the impact that others have on our memories and emotions.

This line emphasizes the idea of trust and intimacy, as the speaker entrusts their memories to another person. It underlines how our experiences and recollections can be intertwined with those we hold dear, making them special and exclusive. In the broader context of "Hamlet," exploring memory ties into the play's themes of loyalty, betrayal, and the complex dynamics of human connections.