Full Idea
Our inference of like effects from like causes is so essential to the subsistence of human creatures that it is unlikely to be trusted to the fallacious deductions of reasoning, which are slow, develop late, and are liable to error.
Gist of Idea
Our awareness of patterns of causation is too important to be left to slow and uncertain reasoning
Source
David Hume (Enquiry Conc Human Understanding [1748], V.II.45)
Book Reference
Hume,David: 'Enquiries Conc. Human Understanding, Morals', ed/tr. Selby-Bigge/Nidditch [OUP 1975], p.55