" And finally, we read in 23:30, which is especially strong, “Therefore, behold, I am against the prophets, saith the Lord, that steal my words every one from his neighbor.” What do the prophets say? This prophet hears that prophet, and then he repeats the message. And all you hear are echoes. It is like being in a hollow, boarded-up building; all you hear is echo, echo, echo, echo. Study the theology of our own day and all you hear is the echo, echo, echo, ECHO! Echoing what? Echoing what this man says, what that man says, what materialistic sociology teaches, what materialistic psychology teaches, what materialistic economics teaches, what materialistic philosophy teaches. Echoing, echoing, echoing as though the words were sprinkled with holy water because they now repeat these same things in theological terms. "

― Francis A. Schaeffer , Death in the City