In heart we have the tendency to feel troubled but Jesus encouraged not to let your heart be troubled (v1); reminding how you believe in God, so also believe in Me (v2)... and that He was going to prepare a place for us and when HE CAME AGAIN to receive you {(v3) receive your heart because you received being born again when He came, so Jesus entered your HEART; because the first time Jesus came was as babe in manger to die for our sin so that He could come again via Spirit into our heart, and so then because of Him we don't have to let our hearts feel troubled if we don't want to... not that heart wouldn't try but just that when it did try, don't let it embrace the trouble}.  Now the purpose for Jesus going away, then coming again is so that "...where Jesus is, there we may be also (v3). {And Jesus is at the right hand of Father God, making intercession for us.  We are to grow up and become hidden in Christ so that as His Body- The Lamb's Wife, we are seated in the heavenly realms in Christ (Ep 2:6) so that at this second coming, of being born again and now heavenly seated because of being matured, we experience the earth and the heaven, and are expected to rule from the heavenly realm (Ep 6) down on our earthly lives so as to make the earth nature submit to a higher, holy calling through our spiritual nature so that Father's will in heaven is manifesting on earth (Mt 6:10)... you get...?//

Jesus already pointed out in verse 1 how you believe in God.  God is Jesus' Father- Father God.  And that's great but Jesus exhorted that He is the Way, Truth, and Life, so you can only get GOD, Father God, His Father, God Who is Love, by coming through Jesus Christ.... no one comes to the Father except through Me (v6).  You can't get LOVE unless you come through Jesus.

John 14.   14 is the biblical number of salvation and this passage of revelation is referring to a born again experience.  i don't believe in coincidence but do believe in Father being a Genius!  John is the apostle of love, a personal revelator, one close to Jesus.... how appropriate to put this love story in the loving guy's book.  And of course there'll be a confirmation but God does nothing without first telling his prophets and Jesus is The Prophet and little loving John is one too.... .