Rev., abideth. Enlarging on the idea of the truth: that which abideth. See on 1Jo 4:9, on the phrase to abide in, see on 1Jo 2:6.
Shall be with us (μεθ' ἡμῶν ἔσται)
With us has the emphatic position in the sentence: and with us it shall be. Note the change from abideth in to shall be with, and see on Joh 14:16, Joh 14:17.