This piece conveys a sense of deep connection and commitment between two individuals. It expresses a bond where two individuals are inextricably linked. The opening line, "I am thine, thou art mine," establishes a sense of possession and intimate connection between the two. This line suggests that they belong to each other, possibly implying a romantic relationship or a profound emotional connection. The following lines reinforce this notion of belonging and permanence. The phrase "Locked fast thou art within my heart" conveys the idea that the person addressed is securely held within the other's heart, symbolizing their emotional attachment. The mention of the lost key signifies that the person is now inaccessible to others and can only reside within the other's heart. The closing line, "So thou inside must ever be," further emphasizes the eternal nature of this connection. It implies that the person addressed will forever remain within the other's heart, implying a sense of loyalty, commitment, and emotional intimacy. Overall, the text speaks to the profound bond between two individuals, highlighting the ownership of each other's hearts and the enduring nature of their connection. It conveys a sense of love, devotion, and a desire for an everlasting union.