“It is not only saints but everything in nature – trees, birds, animals – they all live for the sake of others. Why does a candle burn and melt away? To give light. Why does an incense stick burn to ash? To give fragrance. Why does a tree grow? To give fruit and flowers. Is there anything, sentient or insentient, in this world that lives for its own sake? No.
When the entire nature sacrifices, why should we human beings alone lead selfish lives? We are here to give and give and give. What is due to us will come without our worrying about it.”
– from The Yoga Sutras of Patanjali