Many look down upon acts like cleaning of streets, relief to the sick, feeding the hungry, and service to the poor and destitute as undignified. This is a grievous mistake. The supreme Lord of the three worlds, Sri Krishna Himself, when He came down to proclaim the divine destiny of man, rendered service to beasts and birds. He tended horses and cows with love. In the great Kurukshetra war, disinclined to wield the sword, He was content to figure as a mere charioteer. He made known thereby the ideal of selfless service. The underlying truth of karma yoga is the demonstration of the unity that subsumes the diversity in the universe. Nishkama karma (desireless action) demonstrates and promotes the love principle. There is no greater spiritual sadhana than service. The tendency to distinguish between the spiritual path, the path of service, and the path of knowledge, and regard them as separate is wrong. The three are not distinct; they are one. Seva (service) is spiritual knowledge. Seva is the primary means to acquire divine grace. Without being a devoted follower, you cannot become a worthy leader. Without being a kinkara (one who is ready to do any work), you cannot become a Shankara (the divine). Each one has to realise this truth. Service to society is the highest good.