The Great Promise of Yoga

Yoga practice is not for one who overeats or engages in extensive fasting from food, nor it it for one who sleeps excessively or who does not obtain adequate sleep. For one whose diet and recreation are moderate, whose actions are disciplined, whose routines of sleep and waking are regulated, the practice of yoga removes all unhappiness.
~The Bhagavad Gita 6:16-17 as translated by Roy Eugene Davis in The Eternal Way

The Bhagavad Gita is an ancient scripture which contains deep teachings about how to live our life in the highest way.
In his commentary on these verses, Mr. Davis says "Living in harmony with the rhythms of life nurtures (one's) total wellness and ensures a natural, supportive relationship with the universe." 
This is simple and just requires some discipline. When we live moderately and meditate regularly our physical, emotional, mental health and wellness are greatly enhanced and we can think clearly and compassionately. We know what the right next thing is for us to do. We know peace in our hearts and minds. We know happiness. Mr. Davis also says "Natural living and yoga (meditation and ethical living) practice are not only conducive to happiness, they also remove physical, psychological, and circumstantial causes of future unhappiness." This the great promise of Yoga.