The word stoic, in its modern usage, refers to a person who is indifferent to pleasure, joy, as well as sorrow or pain. Not surprisingly, the dictionary of the Royal Academy of the Spanish Language (RAE) defines stoic in its first meaning as "Strong, equanimous in the face of misfortune" and the same is true of the Oxford dictionary which defines it as a person who suffers pain or problems without complaining or without showing what he feels. However, the Stoic doctrine is rather based on being guided by reason and, because you cannot control what happens around you, controlling what you think about what happens.

For this reason, stoicism focuses especially on the emotions, which it refers to as passions, and which it divides into good, bad and indifferent. The good ones are to be promoted, the indifferent ones are to be ignored and the bad ones are to be dealt with. Stoicism's reflection on this is that people are not disturbed by the things that happen, but by the opinions they have about those things that happen. So, it is a matter of confronting those opinions and, before taking them on board, questioning them as if they were hypotheses rather than firm facts. In this way, they can be refuted by seeking a more productive perspective and getting a rational response to those passions in order to turn them into healthy emotions. 

Cognitive Behavioral Therapy (CBT) is a psycho-social intervention that aims to reduce symptoms of various mental health conditions, primarily depression and anxiety disorders. CBT focuses on challenging and changing cognitive distortions (such as thoughts, beliefs, and attitudes) and their associated behaviors to improve emotional regulation and develop personal coping strategies that target solving current problems. Though it was originally designed to treat depression, its uses have been expanded to include the treatment of many mental health conditions, including anxiety, substance use disorders, marital problems, and eating disorders. CBT includes a number of cognitive or behavioral psychotherapies that treat defined psychopathologies using evidence-based techniques and strategies.

Precursors of certain fundamental aspects of CBT have been identified in various ancient philosophical traditions, particularly Stoicism. Stoic philosophers, particularly Epictetus, believed logic could be used to identify and discard false beliefs that lead to destructive emotions, which has influenced the way modern cognitive-behavioral therapists identify cognitive distortions that contribute to depression and anxiety. For example, Aaron T. Beck's original treatment manual for depression states, "The philosophical origins of cognitive therapy can be traced back to the Stoic philosophers".  ~wikipedia