Perhaps you have heard of 'circadianrhythms'? The phrase describes your body (and therefore mind) interacting with the natural environment around you. To people who eat out of the shopping centre the idea seems alien, but when you eat fresh food from your garden on a regular basis, you inevitably have a closer connection to nature and will even notice that the food you are eating seems to be perfectly suited to your needs of the moment. The nutrients and food types that you require given the seasonal conditions around you.
Maybe the rhythms of your body work in synergy with the living world around you, WHEN YOU LET THEM. Rising and sleeping with the dawn and sunset, sleeping longer in winter, and possibly above all, eating the waxing and waning bounty of the living plants around you is how many people around the world have found new vitality and even beaten disease simply by becoming aware of the missing link between themselves and the natural environment: the food we eat.