In Herman Melville's work "The Enchanted Isles or The Encantadas," the author reflects on the fleeting nature of life and the unreliable promises made by people. He suggests that both oaths and anchors, which are meant to provide stability and commitment, can ultimately falter and fail. This metaphor highlights a profound skepticism about the durability of human intentions and the transient joys they offer.

The phrase emphasizes that beyond these broken commitments, nothing remains constant on this "fickle" earth. Melville's poignant imagery evokes a sense of disillusionment with the ephemeral nature of happiness and the tendency for joy to slip away, reminding us of the fragility of our pursuits and the importance of recognizing the shortcomings of our promises.