Arcana Coelestia #127
127. Men's desire to probe into mysteries of faith by means of sensory evidence and factual knowledge was not only the cause of the downfall of the Most Ancient Church, that is to say, of its descendants - to be dealt with in the next chapter; it is also the cause of the downfall of every Church. For that desire leads not only to falsities but also to evils of life.
John 14:10-11
10
Don't you believe that I am in the Father, and the Father in me? The words that I tell you, I speak not from myself; but the Father who lives in me does his works.
11
Believe me that I am in the Father, and the Father in me; or else Believe me for the very works' sake.