Organized Religion has indeed been corrupted. And you won't find the Creator in any book "written by men." But there is a big difference in the Holy Scriptures. And that can be proven. You only need to type "ancient manuscripts" into Google for the proof that the Scriptures have indeed been preserved. Even the Dead Sea Scrolls offer proof of over 2,000 years of preservation.

"Written by men?":

2Pet.1

[21] For the prophecy came not in old time by the will of man: but holy men of God spake as they were moved by the Holy Ghost.

You will only find the Creator "within?" That's the original mistake.

Jer.17

[9] The heart is deceitful above all things, and desperately wicked: who can know it?