Testimonials — The Key You Didn't Ask For

What others are saying

Testimonials about 'The Key You Didn't Ask For' from readers, experts and leaders worldwide.

Bluvn' Goan. It could have been the title of this book. Karl offers various tools that can help you see the way forward again. They can make you mentally stronger and give you willpower, so that life becomes meaningful again.

Bart Verhaeghe
Entrepreneur & Chairman of Club Brugge

Karl's pivotal message throughout the book is that we can all deal with virtually any challenge, any crisis, any unexpected bad news. It's not really the crisis that matters — it's how we take it in and how we take it on. Bluvn' Goan my friend, and thank you for this wonderful, beautiful book.

Martin Sweeney
Co-Founder Cancer Trials Ireland / UCAN

This personal and powerful work recounts a true heroic journey. What we in California call a 'cosmic wake-up call' challenges us to navigate a transition and learn to surf the wave of uncertainty while maintaining our balance. Karl gives this gift to the world. Many will benefit from this impressive healing journey. Thank you, Karl, for your courage, your authenticity and your truth.

Judith Delozier
Author, Pioneer, Researcher & Developer in NLP, Santa Cruz, United States

As a long-time health coach and trainer, I was genuinely inspired by this book. Karl weaves his personal experiences with reflective wisdom and practical strategies in a way that is both engaging and deeply empowering. The clear structure makes the lessons easy to absorb and apply. This book is a valuable resource for transformation, and I wholeheartedly will recommend it to my clients and students.

Tim Hallbom MSW
Co-Author, Powerful Questions and Techniques for Coaches and Therapists, United States

As a visual expert, coach, and NLP specialist, Karl Mortier supports people in an original and meaningful way. Through his experience with visual methods, Karl helps people reconnect with their creative and inner strength. With his pedagogical and artistic talents, Karl also shares his personal experience of a deep and healing journey through illness. His story is a source of inspiration for anyone who consciously wants to improve their health.

Dr. Jean-Luc Monsempes
Lecturer in Health Care Coaching, Paris, France

This book reads like a train. It is also a wonderful ode to NLP and how it makes a difference in practice every time. This book will contribute to much more than just dealing with illness. It opens up new perspectives.

Hans Demeyer
Supplier In Optimism, Berlare, Belgium

What stayed with me most is not the story itself, but how the book holds it. Karl doesn't try to explain life, fix it, or turn it into motivation. The mix of honesty, humour, visuals and NLP makes difficult inner experiences feel very relatable and human. This isn't a book that tells you how to lead — it shows, quietly, how self-leadership starts when you stop fighting what's happening and start relating to it differently.

Yosef Arefi
Customer Success Manager at Wequity, Brussels, Belgium

As strange as it may sound, I enjoyed this book precisely because it does not shy away from difficult themes — it touched me deeply. It literally left me in tears, which says everything about how powerful and vividly the story is constructed. The alternation between the personal story, practical examples and NLP made it intense, human and particularly fascinating. A book that continues to resonate long after you close it.

Stefaan Beirens
Entrepreneur, Nice, France

In this work, Karl Mortier offers more than an autobiography; he provides an in-depth compass for those navigating the most difficult terrain of life. This is a powerful book, written by a strong and wise person who refused to be defined by a life-changing event.

Nicole VU
Author, NLP Coach and Trainer, Vietnam

This book is about personal leadership, but not as it is usually explained. It is about the quiet process of learning to listen to yourself, daring to make choices and taking responsibility for who you become. Karl played an important role at a crucial moment in my career. Not by providing answers, but by bringing visual clarity.

Tom Lattré
Ypres, Belgium

In the world of visual thinking Karl is a master. We have had the joy of working together for many years. This book is so thoughtful, useful, and heartwarming. Karl manages to connect the dots between a difficult personal situation and great leadership advice, and overall brings such a sensibly positive way to look at life through the power of visual storytelling.

Chris Griffiths
CEO OpenGenius & Author of The Creative Thinking Handbook, Cardiff, Wales

Karl shares a deeply personal life story that feels unmistakably real on every page. The "keys" he offers are in fact golden life lessons, delivered through small stories and anecdotes that linger long after the book is closed. This work is a masterpiece in form, format, and content. A true must-read. When life presents you with an unexpected guest, take Karl's book by the hand — and read it again.

Bernard Moerman
TEDx Speaker and Author of The Golden Cage, Brakel, Belgium

Over the past years, I've seen Karl search, draw, and find words for things that are almost impossible to put into words. That you now bring all of this together in 19 lessons on personal leadership, infused with humor and visual storytelling, feels deeply right. Your blend of imagination, language, and humor is pure gold.

Chris Derboven
YouTube Influencer for 40+, Sint-Niklaas, Belgium

I have always dreamed of saving lives through words. With Karl, I had the opportunity to try, but unexpectedly, it was he who saved mine by reminding me of the true strength of our purpose. There are thousands of books on leadership, but few on the most challenging kind of all: Personal Leadership. This book is living proof that it is possible to ensure that pain does not hurt in excess.

Franco Torres
Coach & Consultant, Argentina

Karl is an artist. A visual magician. A whisperer of words. He plays a new melody of playfulness and wonder, one that drills through any hint of heaviness with a childlike simplicity that disarms without asking permission. This book invites you into his inner journey and shows you how to become the artist of your own life through personal leadership. Enjoy the journey. It is worth it.

Chantal Marlé
Holistic Muse and Whisperer of Meaning, Gent, Belgium

The skills that will carry us through the coming decades aren't written in a manual. They're in this book. Karl doesn't call them skills. He doesn't call them frameworks. He calls them keys. And he simply shows them. And the key that truly matters is precisely the one you never asked for.

Steff Vanhaverbeke
Author of "Being Replaced: The Five Skills AI Can't Automate", Herzele, Belgium

I got to know Karl as someone with an infectious passion and a rare gift for making complex material clear and accessible. What makes him exceptional is the way he combines deep expertise with genuine humanity. Karl has a talent for awakening resilience in others. He lives what he teaches. That's why I would wish a Karl by the side of anyone who wants to take life by the horns.

Isabel Depestel
The Magic of Narrative, Roeselare, Belgium