Lectures and Essays

Lectures and Essays (1879) collects Clifford’s influential lectures on philosophy, science, and ethics. Clifford argues that belief must always rest on evidence; he famously contends that it is wrong always, everywhere, and for anyone to believe anything upon insufficient evidence. He examines the nature of matter, the mind-body relationship, and the moral duties of scientists. Clifford also discusses the interplay of natural science and literature, stressing that science enriches human culture and responsibility. Throughout, he insists that skepticism, honesty, and intellectual integrity are essential for both personal morality and public progress.