Believe in yourself! Have faith in your abilities! Without a humble but reasonable confidence in your own powers you cannot be successful or happy.

Norman Vincent Peale (1898–1993), a prominent American minister and popularizer of “positive thinking,” frequently urged readers to cultivate confidence as a practical spiritual discipline. This quotation is widely circulated in connection with his mid‑20th‑century self-help writing and preaching, especially the message he developed for audiences seeking resilience amid postwar anxieties and the pressures of modern professional life. Peale’s public persona—pastor of Marble Collegiate Church in New York City and author of best-selling inspirational books—made brief, imperative statements like this a hallmark of his style, blending religious language (“faith”) with motivational counsel aimed at everyday success and emotional well-being.

The quote argues that self-belief is not mere vanity but a necessary foundation for both achievement and contentment. Peale balances “humble” with “reasonable,” implying confidence should be grounded in honest self-assessment rather than arrogance or fantasy. “Faith in your abilities” frames competence as something that can be trusted and exercised, not endlessly doubted. The final claim links inner attitude to outward outcomes: without a stable sense of personal efficacy, one is likely to shrink from opportunities, interpret setbacks as proof of inadequacy, and thus undermine both success and happiness. In Peale’s broader outlook, confidence is a moral and psychological habit that can be practiced and strengthened.