John 14:16-31 Jesus prepared His disciples for the coming days.  He said, "And I will ask the Father and He will give you another Helper, that He may be with you forever."  

Jesus said that the Helper is the "Spirit of truth".  He said that they "know Him"...that He abides with them and "will be in " them.   The Helper.. the Comforter will "teach" them, Jesus said,  and He will "bring to your remembrance all that I said to you." 

Jesus speaks what the Father tells Him .. and He  is telling the disciples (and us) about this wonderful  Helper.. The Spirit will show them how the Father and the Son are going to come and dwell with them.. in them and they in Him. This deep and abiding relationship is given to all who keep His commandments.. who love Him and who abide in Him. 

".. because I live, you shall live also... .I am in My Father, and you in Me, and I in you."  Love and obedience are the foundation of this blessed Oneness.. The Spirit helps us to know this and to live in these truths.   This is how we can keep letting our hearts rest in His peace and not in our troubles.  The Father and the Son are greater than any enemy, any fear, any trouble,  and we have the Helper to remind us and teach us what we need to live in this Truth.  Hallelujah!  Amen!