Quote by Paramahansa Yogananda
The happiness of one's own heart alone cannot satisfy the soul one must try to include, as necessary to one's own happiness, the happiness of others.

Summary
This quote emphasizes that personal happiness is not enough to fulfill the soul. To truly find contentment, one must also consider the happiness of others. The well-being and joy of others become essential components of personal happiness. By recognizing and actively seeking to contribute to the happiness of others, one can achieve a deeper and more meaningful sense of fulfillment. True happiness lies in the harmonious balance and consideration of both personal and collective well-being.