"And ye shall know that I am in the midst ... and that I am the Lord your God, and none else: and my people shall never be ashamed" (Joel 2:27)
The period of realization came upon [the waiting ones] when the Father fulfilled His promise and sent the Spirit. God took religion from the realm of the external and made it internal. Our trouble is that we are trying to confirm the truth of Christianity by an appeal to external evidence.
We are saying, "Well, look at this fellow. He can throw a baseball farther than anybody else and he is a Christian, therefore Christianity must be true." "Here is a great statesman who believes the Bible. Therefore, the Bible must be true".
We are all the way out on the wrong track, brother! That is not New Testament Christianity at all! That is a pitiful, whimpering, drooling appeal to the flesh. That never was the testimony of the New Testament, never the way of God did things - never! The proof lies in an invisible, unseen but powerful energy that visits the human soul when the gospel is preached - the Holy Spirit!
The final flash that introduces your heart to Jesus must be by the illumination of the Holy Spirit Himself, or it isn't done at all.
~A. W. Tozer~