Shri Krishna has said in "BHAGVAD GITA" that "Whenever there is a decay of Dharma (righteousness) and an ascendancy of unrighteousness, I manifest Myself; and for the protection of the virtuous, the destruction of the vicious and for the establishment of righteousness, I manifest Myself in age after age". This is the mission of saints who appear at respective times as agents of god. God has to send his agents when people disrespect religion & god, when higher class tries to suppress the lower one, when spiritual preceptors are not respected but humiliated, when people think that we are born learned, when malpractices becomes the sole motive of humans, when Yogis neglect their meditation, when wife,wealth,progency has become more important than anything else in this world. then these messenger's of god try to put things in right order as instructed by god. They serve us as beacon-lights, and show us the right path, and the right way for us to follow.In this way, many saints, viz. Nivritti, Jnanadev, Muktabai, Namdev, Gora, Gonayi, Ekanath, Tukaram, Narahari, Narsi Bhai, Sajan Kasai, Sawata, Ramdas, and various others did appear at various times to show the right path to the people, and so presently came Shri Sai Baba of Shirdi.