It occurs to me that everything everyone does every day is rational, IF you understand the questions being asked. Self destructive behavior–an issue with me–is rational if you assume that failure was inevitable, and that every small failure prevents a much bigger and more painful one.
It is logical to surrender your boundaries, to let people walk all over you, if you assume that you are inferior and they superior.
The essence of cognitive psychology is identifying and tracking these thought patterns, and disrupting them by challenging the base assumptions, which themselves are typically rooted in a mythic, deeply emotional hurt of some sort, either by omission or commission, usually a bit of both.
I tend to privilege the emotional work, but clearly both are appropriate. How you think affects how you feel, and obviously vice versa.