CBT started with the stoics 2000 years ago, and Epictetus was known to say “Men are disturbed, not by things, but by the view which they take of them”. An example of that approach would be, if we try to force our ideas, thoughts, behaviours to others, under the attitude of “You absolutely shouldn’t speak to me in that way!”, then there will be a higher chance that I might feel anger, hurt and possibly guilt. However, if we focus on psychological flexibility, which means taking another perspective on that view, we have a higher chance of feeling annoyed and disappointed that our wishes were not met, and that would be enough to create the space for resolving conflict rather than prolonging it.