In His last messages to the disciples in the 14th and 15th chapters of John, the Lord Jesus clearly teaches us that the very essence of the highest holiness is, "Abide in Me, and I in you, for without Me ye can do nothing."
The very purpose of the Holy Ghost whom He promised was to reveal Him, that at "that day, ye shall know that I am in the Father, and ye in Me, and I in you," and the closing echo of His intercessory prayer was embraced in these three small but infinite words, "I in them."
Is it for me to be cleansed by His power
Is it for me to be perfectly whole
Wonderful promise so full and so free,