The key here is, that to allow our heart to be connected to the Spirit, we must be born again.
We have to embrace life with new eyes and hear with new ears and become One with Christ.
Christ is not a surname of a Man named Jesus, it was the Spirt that gives us light and life.
The heart can also be deceived, love without rational thought, can cloud our vision.
It is Christ that returns, the Holy Spirit and not the flesh as the flesh comes with a New Name, a New Name that Jesus said he would write upon us, but only those that receive it will embrace it.
"The nations will see your righteousness, And all kings your glory; And you will be called by a new name Which the mouth of the Lord will designate"
"He who has an ear, let him hear what the Spirit says to the churches. To him who overcomes, to him I will give some of the hidden manna, and I will give him a white stone, and a new name written on the stone which no one knows but he who receives it"
This is where our heart can become our downfall, we can become lovers of a Name and forget to look for the Spirit that is Christ.
"He who overcomes, I will make him a pillar in the temple of My God, and he will not go out from it anymore; and I will write on him the name of My God, and the name of the city of My God, the new Jerusalem, which comes down out of heaven from My God, and My new name."
It is only fair that I offer that Christ the Son, is now Baha'u'llah the Father, Christ means Annointed One, Baha'u'llah means the 'Glory of God'
So our heart can embrace that same Holy Spirit, but it will take new eyes to see and new ears to hear what the Spirit said to the Churches, and here it is, all readily compiled in "The Summons of the Lord of Hosts".
Of course all IMHO