Our five senses enable us to gather a tremendous amount of knowledge. But all that knowledge is of the Physical Realm.
Man was created as a spirit being that was given a soul and a body by which he operates in the Physical Realm.
Man's spirit (that which connects him to the Holy Spirit) died as a result of rebellion against his Creator.
From that point forward Revelation Knowledge was rare coming through visitations by Angels or the Holy Spirit.
Christ Jesus was born embodying the Truth by Revelation Knowledge from His Holy Spirit.
His purpose in coming was for man to be reconnected spiritually to his Creator, the Holy Spirit.
Christ Jesus paid the penalty for man's rebellion against Him by His own death.
Once redemption was accomplished, the next thing was for man to be reconnected to his Creator.
So, Christ Jesus issued an edict that we would be reborn spiritually by Grace Through Faith in His finished work.
Furthermore, Jesus has offered us His Holy Spirit to teach us, comfort us and empower us.
The teaching part of the Holy Spirit's role in us is for us to receive Revelation Knowledge of the Truth.
Unfortunately, leadership in the church moved away from the Holy Spirit gift of Revelation Knowledge into rationalism.
This resulted in only weak, partial Truth being communicated. The effect was a sense of dissatisfaction in the intelligentsia.
The 'Age of Reason', otherwise known as 'The Elightenment' was a direct result of partial Truth in the church. The void left by the partialness was filled with rationalism.
But the tension between Revelation Knowledge and Rationalism does not permit coexistence.
By allowing place for rationalism, the church enabled its destruction.
As we have seen over the past 200 years, the church has become weaker as rationalism has taken control resulting in promiscuity, violence, communism and nihilism.
We can only 'know the Truth' by spiritual Revelation Knowledge. Hence, we cannot know freedom without it. Without freedom there are many levels of bondage to endure.