Can you believe in biolgical psychology and biological treatments?

Psychology: Yes. There is overwhelming evidence that biochemical changes in the brain are related to behavior, moods, and emotions, and medications can, in part along with psychotherapy, affect positive changes in those areas.

Yes, but: A biopsychosocial approach accounts for a more complete picture.

Yes: We are biological entities. We seem to be a result of chemical and electrical process which have been determined by our evolution (interaction with the environment.

Symptom severity: I believe there can be a biological factor in mental disorders. It depends on the severity of the symptoms of those mental disorders, however. Optimally, I believe that a combination of medication for biological symptoms combined with psychotherapy for emotional issues is generally the best approach to improve overall mental health functioning.