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Gentle Power: A Revolution in How We Think, Lead, and Succeed Using the Finnish Art of Sisu!


Power is fundamental in our lives―we express it in every conversation, relationship, and choice we make. All too often, we equate force and domination with power, while gentleness and compassion are considered “soft” or “weak.” The destructive nature of this skewed perspective has never been more obvious, yet there is reason to hope. Gentle Power is a guide to a very much emergent shift in the way how we define true strength―a paradigm that balances resolve with reason, grit with compassion, and personal success with service to the collective good.

Available as an audio (read by the author), at bookstores across the U.S. and via Sounds True. In Finland and Sweden order yours at Adlibris.


Forbes Magazine

Can Finns Teach the World to Hang Tough?



An In-depth
Personal Interview

(in Finnish)

Les Affaires

Comment Tirer du Positif à Partir Du Négatif?

(in French)



Sisu &

Mental Toughness

BBC World

Sisu: The Finnish Art of

Inner Strength



Want to Achieve Your Goals? The Finns Have a Word for That

Matador Network


What the Finnish Concept of Sisu, or Inner Strength, Can Teach Us

Psychology Today


An Ultramarathon Runner's Secret to Mental Toughness by Dr. Emma Seppälä


Positiivisen psykologian voima 2!


The Finnish Educational Textbook

on Positive Psychology


New and updated version of the best-selling educational resource book for Positive Psychology in Finland (in Finnish). New materials on select topics from 17 experts including a chapter on sisu entitled: "Sisu: Gentleness, self-awareness and wise action in the face of adversity (Sisu: Armollisuutta, itsetuntemusta ja viisasta vahvuutta vastoinkäymisten äärellä) that discusses sisu from a vantage point of long-term good action, intestinal fortitude, and systems intelligence.  

Positiivisen psykologian voima (2023) for sisu lab friends via this link for 36,70 eur (reg. 45,90 eur).

Sisu: Tarinoita itsensä ylittämisestä

ja hyvän tekemisestä


The Finnish Book on Sisu


This book shares the stories of Finnish people from all walks of life as they overcome adversity, use creativity to transform barriers into frontiers, and take action against all odds. 

It outlines a message of hope in tough times and shows us that there is always more to us than meets the eye. One way to remember this inner fortitude within us is through witnessing and celebrating the inspirational stories of all the many sisuesque humans in our world.

Order Sisu: Tarinoita itsensä ylittämisestä ja yhdessä tekemisestä with a sisu lab discount here.


Positiivisen psykologian voima (2014)


This textbook is one of the primary educational resources for Positive Psychology in Finland. The book consists of 16 chapters incl. topics such as positive pedagogy, workflow, mindfulness, a critique of positive psychology, strengths in aging, happiness vs. meaning, as well as a chapter entitled "Sisu - An Action Mindset" (i.e. sisu within communities, post-traumatic growth, and relationship between adversity and well-being).

The book is SOLD OUT from the publisher. You may find a copy via AdlibrisNote: Link to sisu chapter PDF in the blog section of this website.

Business Insider

Leaders Should use 'Gentle Power' to Unite and Encourage Teams During Uncertain Times

Positive Psychologists 

on Positive Psychology


Interviews with the

Field's Leading Practitioners

Our Words Make 

Worlds: Introducing Sisu

Summary of Sisu

and its Early-stage research

Brilliance of a Dream:

Introducing the Action Mindset


An Introduction to

Action Mindset

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