There is not to be found, in all history, any miracle attested by a sufficient number of men, of such unquestioned good sense, education and learning, as to secure us against all delusion in themselves.

In this quote, David Hume critiques the idea of miracles and challenges the assumption that miracles, even if attested to by credible witnesses, can provide sufficient evidence to believe in their authenticity. Hume suggests that even when educated, learned, and sensible individuals testify to the occurrence of a miracle, it still cannot be considered reliable proof. The quote reflects his skepticism about the ability of human testimony to definitively establish extraordinary claims. In essence, Hume argues that no number of people—no matter how rational or knowledgeable—can guarantee that their accounts are free from delusion or error.

Hume's skepticism arises from his broader philosophy on empiricism and reason. He believed that knowledge should be based on observable evidence and logical reasoning. Miracles, by definition, defy the laws of nature, and Hume saw them as inherently implausible. Even if many well-educated people claim to have witnessed a miracle, it does not provide enough evidence to justify belief in something that contradicts our everyday experience of the world. In other words, the weight of testimony alone is not enough to overcome the evidence provided by our own sense perception and the consistent laws of nature.

This quote is part of Hume’s broader skepticism about human perception and the reliability of testimony. It questions the credibility of reported miraculous events, suggesting that even with extensive education and intelligence, humans are still susceptible to cognitive biases, errors in judgment, and emotional influences that may lead them to misinterpret or delude themselves. Hume’s assertion is that such human failings should lead us to be cautious in accepting extraordinary claims without rigorous and empirical evidence.

In the context of Hume's philosophical work, this quote reflects his empirical approach to knowledge. He advocates for a reliance on reason and evidence over unverified testimony or religious doctrines. The quote emphasizes the idea that human understanding is limited, and even the most intelligent individuals are not immune to misinterpretation or delusion, making it crucial to question the validity of extraordinary claims unless supported by overwhelming evidence.