5 Animentur = "are furnished with their animae."
8 These vessels which carry the blood from the heart were formerly supposed, from being found empty after death, to contain only air; and hence, indeed, their name,-for "the artery" was originally the windpipe. Comp. Cicero (De Nat. Deor. ii. 55, 138): "Sanguis per venas in omne corpus diffunditur, et spiritus per arterias": i.e. Blood is diffused throughout the body by the veins, and by air by the arteries.
9 [The names of these various medical schools may be found explained in the article "Medicine" in the ninth edition of the Encyclopoedia Britannica, vol. xv. See especially p. 802.-W.]
19 See above, Book i. 17 [xiv.], and following.
20 This repetition of one word for rhetorical effect is characteristic of our author (as, before him, it was of the Apostle Paul): "Intellige quid non intelligas, ne totum non intelligas...qui ut veraciter intelligat, quod non intelligit hoc se non intelligere intelligit."
23 [The author seems here to have such texts as 1 Thess. v. 23 in mind (see below, chs. 19 and 36), and to mean that sometimes the whole inner man is called "spirit," and sometimes "spirit" is distinguished from "soul."-W.]