The deepest principle in human nature is the craving to be appreciated.

The quote claims that beneath more obvious motives—pleasure, power, security—lies a fundamental desire to be recognized as valuable by others. “Appreciated” here implies more than praise: it includes being seen accurately, having one’s efforts acknowledged, and receiving social confirmation of one’s worth. Read this way, the line anticipates later psychological emphases on belonging, esteem, and validation, and it helps explain why neglect or indifference can feel disproportionately painful. It also implies an ethical and practical lesson: offering sincere recognition can be a powerful way to influence, teach, or heal, because it addresses a basic human need.