JMNT(i)
19 "Whosoever, if I may be having affection for them (regard them as fond friends), I constantly put to the proof (or: expose; reprove) and I continuously educate (discipline; give child-instruction). Therefore be hot (zealous) and change your mind (your way of thinking; your attitude and frame of mind)!
20 "Consider! I have stood, and continue standing, upon (= at) the door (entrance), and I am constantly knocking; if ever anyone may (or: can) hear My voice (or: sound) and would open the door, I will proceed entering (coming or going in) toward him, and then I will continue eating the evening meal with him, and he with Me."