If we were to interpret the lives of animals with a human eye, we would conclude that they are in flow most of the time because their perception of what has to be done generally coincides with that they are prepared to do. When a lion feels hungry, it will start grumbling and looking for prey until its hunger is satisfied; afterward it lies down to bask in the sun, dreaming the dreams lions dream. There is no reason to believe that it suffers from unfulfilled ambition, or that it is over-whelmed by pressing responsibilities. Animals’ skills are always matched to concrete demands because their minds, such as they are, only contain information about what is actually present in the environment in relation to their bodily states, as determined by instinct. So a hungry lion only perceives what will help it to find a gazelle, while a sated lion concentrates fully on the warmth of the sun. Its mind does not weigh possibilities unavailable at the moment; it neither imagines pleasant alternatives, nor is it disturbed by fears of failure.
~ Mihály Csíkszentmihályi, Flow (1991), p. 227-228