It is human nature to instinctively rebel at obscurity or ordinariness.

The line frames a craving for distinction as a basic, almost reflexive, element of human psychology. “Obscurity” and “ordinariness” stand for anonymity, social invisibility, and the fear of being unremarked; to “rebel” suggests that people do not merely dislike these states but actively resist them through ambition, self-fashioning, status-seeking, or the pursuit of recognition. Read this way, the quote can be taken as both descriptive and cautionary: it explains why individuals may strive, compete, or dramatize their lives, while also hinting that such striving can be driven less by genuine vocation than by discomfort with being average or unknown.