When the Blind Lead the Blind (Matt. 15:14) “If the blind lead the blind, both shall fall into the ditch.” We must be careful what kind of thought we are following. We must test all ideas to see whether they are of the Truth. It is a mistake to accept every man’s philosophy simply because it sounds plausible. We are to be on guard against accepting that which is not true. And let us remember this: the Truth is simple, direct and always self-evident.

False ideas heaped upon false ideas make bad matters worse. The whole confusion of the world arises from fundamental errors of thought. Chief among these errors—and the father to a greater part of the others—is a belief in duality. The belief in duality supposes that evil is equal to good: that a suppositional devil divides, with Good, the kingdom of Truth. Such things cannot be.

Remember the teachings of Moses, that “God is One.” If, on the other hand, we accept that evil has a power equal to good, then we must fall into the ditch of our own confusion. To believe in the good alone, may seem fallacious to many, but he who thus believes will find his path lighted by a torch which flickers not, nor fails.

Holmes, Ernest; Jean Houston (1998-08-24). The Science of Mind: The Definitive Edition (pp. 453-454). Tarcher. Kindle Edition.