"Mind precedes all mental states. Mind is their chief; they are all mind-wrought," is what my translation says.

Again, thoughts that emerge can be contradictory, random, or irrelevant. By allowing our thoughts to drift by, witnessing them as if they were clouds passing in the sky, we can learn to quell the overactive mind. But we can't BE all that we think. "Don't believe everything you think!" being a version of this Buddhist line of thinking.