Rivet: angels, if present, would be received; being unseen and not everywhere, they are not greeted
Rivet treats honor of rational creatures, angels and humans, together.
If angels are present we do not know when or where, unless they appear visibly as they once did.
Some are often near and helpful, but there is no conversation with them, they are not everywhere, and they do not search the heart, so we neither speak to them nor greet them with outward signs.
The patriarchs did greet angels whom they received as men; apart from that, angels are spoken of with honor, and their obedience is magnified for imitation.
Latin
XXXVIII. Andreas Rivetus autem sic pluribus philosophatur de honore qui debetur creaturis rationalibus, sive Angeli, sive homines sint. Si adsint, inquit, Angeli, id nobis incognitum est quando, & ubi, nisi aliquando visibili specie, ut olim factum est, nobis appareant. Alioquin aliquos nobis adesse saepius, & nos juvare novimus: sed quia nobis non est cum eis sermonis commercium, nec ubique sunt, nec cordium nostrorum recessus scrutantur: ideo non solemus cum iis verba commutare, neque signis externis eos salutare. Quod cum praesentibus hominibus facimus, & cum Angelis olim fecerunt Patriarchae, qui domi suae exceperunt, quos homines putarunt. Extra hanc occasionem de Angelis loquimur (Angelus suos intelligo) cum honore & reverentia, eorum naturam, officia, obediendi Deo promptitudinem magnifacimus, & hanc nobis imitandam proponimus.