Victorian men of science struggled to address a central question of nineteenth-century British thought: how do fallible human beings recognize truth? Their solution, embodied within the principles establishing the British Association for the Advancement of Science, focused on a stable set of selfless epistemic virtues—patience, humility, diligence, disinterest, self-control—that provided moral stability amid the relentless advance of new and revised theories of physical reality. But if well-founded ideas flow from virtuous practices, did it not follow that dangerously unsound ideas stem from vice? For this reason, a widely shared commitment to virtuous conduct meant that intellectual disagreements often degenerated into accusations of immoral behavior. This essay explores the complicated role of epistemic virtue in Victorian science by examining three towering products of the University of Cambridge: John Herschel, Adam Sedgwick, and William Whewell.