The quote reflects a poignant moment of loss, emphasizing the deep bond between friends. It signifies the profound emotions that arise when someone we care about is no longer present in our lives. The phrase "My heart has joined the Thousand" suggests a collective grief, resonating with the impact of losing a loved one within a community or group.

In Richard Adams' "Watership Down," this expression encapsulates the themes of friendship, loyalty, and the inevitable experience of mourning. The character's heartache symbolizes how death not only affects individuals but also connects the living in shared sorrow, highlighting the enduring nature of friendships even after loss.