How is the "self" able to recognize the interplay between the cognitive process and "desire"?

I read in [Going for Refuge & Taking the Precepts](http://www.accesstoinsight.org/lib/authors/bodhi/wheel282.html) by Bhikkhu Bodhi that "cognition is subservient to wish", and "in subtle ways concealed from ourselves our desires condition our perceptions": > The Buddha teaches that cognition is subservient to wish. In subtle ways concealed from ourselves our desires condition our perceptions, twisting them to fit into the mould they themselves want to impose. Can the practice of insight meditation reveal this deception of the "self", and, if so, how does the process work?