The first is quite obvious. If we eat poor quality foods, or over or under eat, then we can quickly make our bodies sick.
These days it has become even more important for us to follow this sage advice as our processed diets are now more responsible than ever for polluting our systems and causing many of our modern ailments. We can easily see this in the alarmingly ever increasing rates of obesity, heart disease, dementia and cancers. So obviously eating good clean, natural and nutritious foods in moderate amounts is part of the way to bring balance to our lives and to keep ourselves strong and avoiding illnesses.