Thanks for commenting the difference, but what would happen when people use rational thinking only to construct excuses, that is rationalization of what they do

Thanks for commenting the difference, but what would happen when people use rational thinking only to construct excuses, that is rationalization of what they do. An example: I am a rational people, I will pick certain portion of reality that allow me to construct a good model of myself, with blind eyes for the part I don't want to see. You can use "rational thinking" to construct rationalization of your behaviour. Since there is no logical notion of justice, rational thinking and rationalization are not far away.