It is as impossible to withhold education from the receptive mind, as it is impossible to force it upon the unreasoning.

Repplier contrasts two limits of teaching: a mind that is genuinely curious will learn despite obstacles, while a mind that refuses to reason cannot be made educated by external pressure. The line challenges purely coercive or mechanical models of schooling, implying that education is not simply the transfer of information but an active, voluntary engagement of intellect and judgment. It also carries a moral and psychological claim: receptivity and rational openness are prerequisites for learning, and attempts to “force” education can produce only compliance or rote performance, not understanding. The aphorism thus elevates intellectual agency—both the learner’s desire and capacity to think—as the decisive factor in real education.