The first step in being rational though is to realize that choices are made under certain conditions, and are affected by them, not by some external agent that is totally neutral and impartial to the body's material conditions and social circumstances.

In other words, you "make" decisions only partially, and your choices are shaped by your status in life, before your conscious self can "chose".

http://science.sciencemag.org/content/338/6107/682

https://www.theatlantic.com/business/archive/2013/11/your-br...

https://qz.com/964920/data-show-poor-people-make-better-fina...

http://news.berkeley.edu/2015/03/02/anxious-people-decisions...