Blake’s memorable fancy from The Marriage of Heaven and Hell, told by Neville in **eight lectures** (9, 1279, 1298, 1339, 1871, 1896, 1915, 1966) and used as the warrant for the whole technique. Blake dines with Isaiah and Ezekiel and asks whether a firm persuasion that a thing is so makes it so. Isaiah replies that all poets believe it does, and that in ages of imagination a firm persuasion removed mountains - but that many are not capable of a firm persuasion of anything today. Neville glosses poets as prophets (at 1915 he says so outright: the poets, that is, the prophets; they were the poets) and takes the reply as permission rather than as poetry: that I can persuade myself I am the man reason and my senses deny - yes. He then closes the gap between belief and fact with an argument from ordinary things: everything in this world was once only believed; what is now proved was formerly only something desired and believed; this building, these clothes, everything here was once only believed and then came into being. THE MOUNTAIN MATTERS: this is where Neville's talk of moved mountains comes from, and it is Blake's phrase rather than the gospel's - so occurrences of removed or moved mountains in this corpus should be checked against this motif before being read as Matthew 17:20. PROVENANCE: coined 2026-09-20 OUT OF SEQUENCE from attach-lane evidence rather than from my own chronological read. The attach lead supplied the lecture list and passage ids (PM 6063); I read the passages before coining but have not read those lectures whole. The architect ruled out-of-sequence coining acceptable on this condition (PM 6056). Occurrence confidence is 0.95 rather than 0.99 for that reason.