The first element to creating change is insight. Most of the time, our life is being governed by unconscious patterns. Therapy helps us become conscious of our limiting patterns and with that new awareness, we have the freedom to choose different behaviors.
The second element is having new experiences. For example, many times couples try to talk to each other about important issues but end up feeling angry and misunderstood. Having the experience in therapy of being really heard and validated by your partner can help us feel close and a lot more connected.