The sages use to observe nature and apply the same principles to attain balance and health. Fall is time to start retrieving and withdrawing to prepare for the winter. It is a time to let go of what is not useful and harvest what is useful and save it. This apply to mind, body, and spirit. Letting go of not useful diet habits, toxic thinking, and bad spiritual attachments. It is a time of transition from the total yang of the summer to the total yin of the winter. Any time we are transitioning were are vulnerable, prone to invasion, so you have to protect yourself. Fall is ruled by the metal element and the lungs, that is why disease during this time attack the lungs such as cold and flu. Start to slow down (physically, mentally, and emotionally) and warming yourself to prepare to store for the winter ahead. Acupuncture, yoga, meditation can help us slow down, herbs such as onions, ginger, cinnamon can warm us, astragalus can help us create that protection (immune booster). Follow and respect the season so that you can have a smooth and healthy transition.