Why is it that plans can, sometimes even need to change over time? At the same time: Should guiding principles be designed to live long term and to be resistant to short term change? To both questions my answer is a firm yes. Here's why: The principle of the benefit of long lasting habits is one that fascinated me early on. The imagination that any person can improve to levels beyond their own imagination by merely sticking to a habit over a long period still strikes me. One of my oldest habits is sports. I started swimming as a member of a club -and later also as one of a competitive team- as a young teenager and have stuck to some kind of sports habit ever since. When I started first I went to training sessions twice a week. At my peak I did six to eight training sessions a week and most of my school holidays were spent either on training camps or competitions. So my first serious habit was established during those early years. After school I was not always able to swim due to re...