en_tn/jhn/16/13.md

the Spirit of Truth

This is a name for the Holy Spirit, who will tell the people the truth about God.

he will guide you into all the truth

The "truth" refers to spiritual truth. Alternate translation: "he will teach you all the spiritual truth you need to know" (See: rc://en/ta/man/jit/figs-explicit)

he will say whatever he hears

Jesus implies that God the Father will speak to the Spirit. Alternate translation: "he will say whatever God tells him to say" (See: rc://en/ta/man/jit/figs-explicit)