“One of the most important sentences in my book ‘Prologue’ is: ‘Thinking in terms of sustainability is thinking in terms of congruence .’ This was meant as a basic principle for future management, but it equally applies to the idealistic, creative, and operational aspects of managing an architecture firm. True sustainability requires the coherent interplay – the congruence – of ecological, social, and economic factors. As a responsible employer, entrepreneur, and architect, I both need and strive to think in this holistic way.”