Bowing and kneeling suit the present, not a Saint in America or China, still less one in heaven
Greeting, uncovering the head, and bowing are used toward holy people we actually live with, and only when they are present.
It would be absurd to bow or kneel in France, at home or in church, to honor a holy man traveling in the Americas or in China.
Saints reigning with Christ are as far from us as heaven from earth, so those signs toward them are held contrary to reason.
Latin
XXXI. Sic viros sanctos quibuscum versamur officiose salutamus, caput illis aperimus, & corpus inclinamus: sed talibus honoris signis uti solemus tantum erga praesentes. Et absurdum esset, si quis in honorem hominis Sancti, apud Americanos, aut Sinenses peregrinantis, hic in Gallia domi suae, vel in loco sacro, corpus inclinaret, aut genua flecteret. Ideoque cum Sancti in caelo cum Christo regnantes tantum a nobis absint, quantum a terra caelum, a ratione putant omnino alienum esse, ut honoris ejusmodi signa erga illos adhibeamus.