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Psychedelics can be applied as a tool for positive change. Wonder how? Our guides are here to answer any questions you may have. Sign up for a free online workshop to enter the world of psychedelics well-informed and with confidence. Get an essential insight into the effects of psychedelics on the mind and practical tips on how to get the most out of your psychedelic experiences. Please pick a date below.

Beneficial TOOls for TRANsforMATION

Change your mind and habits

Psychedelics can reveal aspects of ourselves that may remain unseen in our daily lives. They can help create new neural pathways, allowing you to transform old habits into more beneficial behaviour.

Access your intuitive intelligence

Psychedelics can play an essential role in human growth. Learn how your inner explorations can be a starting point for positive change. Find profound insights and a renewed sense of joy, meaning and creativity.

Reconnect with nature

We are convinced that the benefits of psychedelics and the longevity of their effectiveness is highly increased by embedding them in nature and supporting them with meditative practices and sound therapies. Learn how to get the most out of your psychedelic experience.

Workshop TEAm

Maarten and Janneke have guided hundreds of people through our extensive psychedelic programs. They are convinced that the challenges of the future are best addressed by reconnecting with nature and self-discovery.


Chief Executive
Founder | Mentor

Maarten has been teaching meditation and assisting people to make the journey inward for over a decade. With silence, plants and fungi he guides people towards natural wisdom. Maarten has founded Delight Yoga, Wisdom in Business, Return to Sender and The Loft. These initiatives function as a network of organisations united around one sole purpose: inspiring a more natural and conscious way of living. Early in his career, he worked for some large companies which allowed him to think big in terms of organisation and communication. Leading several creative agencies taught him the power of storytelling. Spinoza forms the pinnacle of a personal journey with plant medicine starting in 1999 and has grown into an intelligent network of therapists and scientists united in the mission to experience and experiment with the health potential of natural medicine and nature therapy. Maarten is a proud father to Philip, Alexander and Victoria, and dedicated husband to Anna.

jannEKE KRIJGsman

Head of Experiences
Mentor | Teacher

Janneke loves guiding people to reconnect to their most authentic self. For many years she has been teaching meditation, yoga and breathwork, while also exploring the fields of plant medicine. For the last couple of years she has specialized in working 1 on 1, assisting people to find more clarity in the various challenges of life. Continuously inspired by her own inner journey, Janneke naturally invites people to discover their inner world, with all its depth and beauty. She has been with Spinoza from day one and has been essential in creating the Spinoza Programs. Janneke brings a peaceful and loving presence as well as her voice and music to each Spinoza Ceremony. She loves beautiful conversations, early morning dips in the sea, and sharing homemade food with her loved ones. She lives in The Hague and is a dedicated mother to her son Maas and daughter Ief.


Our Psychedelic PROGRams & prODUCTS

Spinoza Transformation Box

With our team of scientists and artists, meditators and experts, we have developed a series of programs, retreats and products for personal growth and to reconnect with nature.

Based on our programs, we have created the Transformation Box. This is a program in a box which contains everything you need for safe psychedelic journeying in the comfort of your own home. 

This includes our intuitive app which provides access to an educational psychedelic Masterclass, a library of meditative practices and immersive musical sound therapies. You can connect to the community through live workshops, ceremonies and Q&A’s