This is from the fourth chapter of New Life in Christ Jesus…
When Jesus left earth and went back to heaven, the paradigm for knowing God shifted a bit. While He was on the earth, knowing God and knowing the Spirit were by means of knowing Jesus. But starting at Pentecost, when the Spirit of the living God first took up residence in the hearts of men, knowing God and knowing Jesus were by means of knowing the Holy Spirit. In some regards, this is only a superficial distinction, because God the Father, God the Son, and God the Holy Spirit are one (1 John 5:7). But on the other hand, it is not merely superficial because our experience with God and our interactions with Him are by direct and intimate personal contact with His Spirit. We know God the Father because we know His Spirit. We know God the Son because we know His Spirit.
Jesus made it clear that the one and only way for a man to know God after His resurrection would be through interaction with His Spirit. He had already previously said that all authority had been given to Him to make God known or to keep Him hidden: “All things have been delivered to Me by My Father, and no one knows the Son except the Father. Nor does anyone know the Father except the Son, and the one to whom the Son wills to reveal Him” (Matt. 11:27). In His final words to the disciples He revealed the means by which He intended to execute His authority to “reveal” God to man. It started with a simple statement of fact:
A little while longer and the world will see Me no more, but you will see Me (John 14:19).
Immediately after Jesus said this, Judas (not Iscariot) recognized what Jesus was saying. But he could not imagine how Jesus would be able to show Himself to His disciples and simultaneously hide Himself from the rest of the world. So he asked Him, “Lord, how is it that You will manifest Yourself to us, and not to the world” (John 14:22)? It was to that question that Jesus gave this answer:
If anyone loves Me, he will keep My word; and My Father will love him, and We will come to him and make Our home with him (John 14:23).
Jesus was telling His disciples that after His death, He and His Father would take up permanent residence in the hearts of men, and that They would reveal Themselves to them from inside their hearts. Those who would be privileged to have God in their hearts would experience the blessings of getting to know God better over time. But those who would not have God in their hearts would remain ignorant of Him altogether.
With these words, Jesus revealed exactly how God intended to fulfill the promise He made to Jeremiah concerning the new covenant (Jer. 31:31-34). Every one of His people would know God, from the least of them to the greatest of them, because God would reveal Himself to them personally and show them His glory from the depths of their own hearts.
Some people say that we don’t need anything but the Bible to teach us about God. But they are wrong. The Bible’s testimony is clear. If we have the Spirit of God living in our hearts, then we have everything we need to know God because He teaches us about Himself from the depths of our own hearts.