Well, here's how you can think about the mind as well. When its object is something which is lit up by truth and reality, then it has—and obviously has—intelligent awareness and knowledge. However, when its object is permeated with darkness (that is, when its object is something which is subject to generation and decay), then it has beliefs and is less effective, because its beliefs chop and change, and under these circumstances it comes across as devoid of intelligence.