One hymn that hasn't been mentioned here, and that I consider one of the all-time greats, is K's "How Firm a Foundation", and I like to sing all seven stanzas (I generally do like to sing more stanzas than a typical congregation can tolerate) ;-) ... one nice thing about it is that the whole thing is "God speaking", now to the individual, now to the body (you can tell by the pronouns in the unmodernized text): vv. 1-2 are to the body (v. 1 actually not by God but by an impersonal narrator), 3-5 to the individual, and 6-7 in the third person. Since it's written in the persona of God, it's not a hymn by Augustine's definition, but it's clearly a hymn none the less. Oh, and definitely to the American "Foundation" tune (= "Bellevue", "Protection", etc.), not "Montgomery" or "Adeste Fideles".

Haruo