Viktor Frankl survived four Nazi death camps, including Auschwitz. He was a psychotherapist who taught that humanity’s primary motivational force is the search for meaning:
Don’t aim at success - the more you aim at it and make it a target, the more you are going to miss it. For success, like happiness, cannot be pursued; it must ensue, and it only does so as the unintended side effect of one's personal dedication to a cause greater than oneself or as the by-product of one's surrender to a person other than oneself. Happiness must happen, and the same holds for success: you have to let it happen by not caring about it. I want you to listen to what your conscience commands you to do and go on to carry it out to the best of your knowledge. Then you will live to see that in the long-run - in the long-run, I say! - success will follow you precisely because you had forgotten to think about it.”
From the excellent Senscot e-mail bulletin produced by Laurence de Marco.