This article discusses the tension between trust, as an expression of interpersonal commitment, and critical thinking, which includes a demand for reasons. It explores the importance of each for individual flourishing, and then seeks to establish some ways in which they intersect, drawing on ideas of authority and trustworthiness. It argues that despite the appearance of a deep tension between trust and critical thinking, they are importantly interdependent: if trust is to be warranted, critical thinking to determine trustworthiness is required; and if critical thinking is to be developed, contingent trust in certain authorities is necessary.