But the Counselor, the Holy Spirit, whom the Father will send in my name, will teach you all things and will remind you of everything I have said to you.
The most profound part of this verse didn't strike me until I looked at the base of the sentence without all the clauses: "...the Holy Spirit...will teach you all things...".
Are there things we don't know? Yes, many things. Do we want to learn them? Yes. How often when we are seeking to learn them are we thinking about the Holy Spirit, and acknowledging that the Spirit is one who will teach us all things? For me the answer is not often.
It is interesting enough to think that the Spirit would teach us anything, but it is fascinating that Jesus would specify that nothing we learn will be learned without the Spirit. No knowledge or wisdom is outside of the bounds of what the Spirit teaches.