Acharya Prashant explains that while we often investigate the sources of external information, we rarely inquire into the source of our own thoughts and emotions. He suggests that we remain identified with our thoughts and avoid their source because seeing the source of our delusions would make them unacceptable. This avoidance is a form of chosen blindness, as certain pleasures and habits can only persist if we remain ignorant. He notes that people are not incapable of understanding, but rather unwilling, because understanding is dangerous to the ego's 'sandcastle' of delusions. He defines a saint as someone whose love for the light is greater than their habit of darkness.