What the Spirit says? Who dat?
Thousands of years of wisdom? You mean like torturing people who didn't think that the earth was flat? The wisdom that teaches you to retaliate (an eye for an eye)? ...
The Bible teaches us to turn the other cheek. It's the Hammurabi code that teaches and eye for an eye and a tooth for a tooth. The Bible teaches us to love our enemies as ourself.
The Holy Spirit is the Third member of the Godhead or Trinity, whatever you would like to call it. He is a testifier. His primary role is to bear witness of the Father and the Son. He is the one who reveals truth to people through the Still Small Voice. He is also a sanctifier and purifier. His influence purifies our spirit and refines our nature.
The Holy Spirit can influence people regardless of their faith in Christ. In fact, it is often when He testifies to them that people come to know that Jesus Christ is their Savior. Those who have faith in Christ can obtain the Holy Spirit as their constant companion. This is done by exercising faith in Jesus Christ and Repenting of your sins. When you begin to repent you will understand the need to be baptized by water. After this baptism comes the laying on of Hands for the Gift of the Holy Spirit or the Baptism by fire.
It wasn't the Bible that taught the world was flat, nor that people who disagreed should be tortured. It was the so called academics of the day that persecuted those that disagreed with them.