
The Vessel of Self-Worth
A practical approach to increasing self-worth and self-care
A regular on-site group starts on September 9th, 2025 (fully booked).
The specific group for people with intellectual disabilities (LVB) started on april 7th, 2025 (online).
See “Courses” for more information.
The Vessel of Self-Worth is a standalone psychological model for behavioral change. It was developed by Dr. Gertjan van Zessen, psychologist and NVVS sexologist, as a new treatment model for people with persistent behavioral addictions. Today, the method is applied to a wide range of psychological, psychiatric, and psychosocial issues. The goal of the model is to help people build higher self-worth, enabling them to:
- Be more satisfied with themselves and others
- Be more productive and procrastinate less
- Take action and get moving more easily
- Practice more self-care
- Experience fewer negative needs and patterns
- Break free from ingrained patterns
- Feel more in control of themselves
- Experience more calmness and less stress
- Connect better with others
These are significant changes that can be achieved through a seemingly simple thought model and straightforward homework exercises. The core of the method is that self-worth—a positive rather than judgmental relationship with oneself—is crucial for achieving and maintaining behavior change. Self-worth is strengthened by seeking out concrete, small, achievable experiences that provide a small sense of satisfaction. The aim is not intense positive experiences; it’s about frequency and systematics: people are taught to regularly and consistently engage in small self-rewarding activities and thoughts, creating a new mindset.
As self-worth increases, the composition of the self changes. When the level of positive self-worth in the “vessel” rises, the critical, deficient, destructive part of the self must shrink: the vessel of self-worth always has 100% capacity. Where self-worth exists, there can be no emptiness, and vice versa.
Perhaps the most remarkable aspect of the method is how quickly it works in the hands of an experienced practitioner. Gertjan van Zessen personally treated many people with difficult and persistent behavioral addictions in an average of six sessions. The benefit is not so much about better control over the problem behavior (which almost always occurs) but primarily in increased agency and self-care in a broader sense.
Despite its appearance of simplicity, the Vessel of Self-Worth is not a self-help method. It is a technique for psychotherapists, trainers, and coaches who have received specific training in its application. The model can be used individually or in relationships (“two communicating vessels”).
Treatment using this model is light, constructive, future-oriented, and concrete. The model aligns with the positive psychology trend, which focuses on strengthening what goes well rather than analyzing and interpreting what goes wrong. It is based on scientific research. Studies on its effectiveness are conducted in collaboration with the Open University. The Vessel of Self-Worth may only be offered by certified professionals.
Want to read more? Here is a link to books about the Vessel of Self-Worth.











