In the ancient wisdom of the world, caring for the elders is considered a high duty and critical spiritual practice. For example, an ancient scripture of India says, "The root of comfort and happiness is harmonious relationship and sufficient wealth. The root of harmonious relationships and sufficient wealth is wise choices. The root of wise choices is self control. The root of self control is humility and discipline. The root of humility and discipline is service to the elders. Through service to the elders, one obtains experiential knowledge and wisdom."