The Simpson devotional for today has this insight:
So in the days of Christ, it was the bondage of the Jews to the traditions of their fathers and the opinions of men that kept them back from receiving Him. How can ye believe, He asked, which receive honour one of another; and seek not the honour that cometh from God only? (John 5:44).
The same occurs today. People love their religious traditions which exalt and honor men. So they do not believe in the word of God. Human honors squelches faith in the divine.