Personally, I would avoid using the 2nd stanza of the 3-stanza version, "Procul recedant somnia", dreadng evil dreams. It's not what happens when we're asleep, but what we think and do while we're awake that we should worry about.
Dom Lentini explains in his commentary on the reform of the hymns, of which he was the principal architect, that the crudity (crudezza) of the verse Ne polluantur corpora "clashes" (urtante), presumably with the sensibilities of that most delicate of creatures, Modern Man™, and in any case, we now understand temptation much better than they did back when the hymn was composed in the 5th or 6th century.
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