J. Gresham Machen provides some excellent Holy Week reading:

“And if he (Christ) is living, we come to him today. And thus finally we add to the direct historical evidence our own Christian experience… The “witness of the Spirit” is not, as it is often quite falsely represented today, independent of the Bible; on the contrary, it is a witness by the Holy Spirit, who is the author of the Bible, to the fact that the Bible is true.”