Philosopher A1 Gini offers this summary of the human fulfillment model:
Descartes was wrong. It isn't Cogito ergo sum, but, rather, Laboro ergo sum. We need work, and as adults we find identity and are identified by the work we do. If this is true then we must be very careful about what we choose to do for a living, for what we do is what we’ll become. To paraphrase the words of Winston Churchill—first we choose and shape our work, then it shapes us.