Healing plants are our allies in the natural world.  For every human ailment there is an herb that can help.  Our very breath is linked to plants, we inhale O2 and exhale CO2, they exhale O2 and inhale CO2.  We are in the ultimate symbiotic relationship.  Every culture, even animals use herbs for wellbeing.  Herbs can help balance your constitution when used appropriately as medicine and in food.