“Whenever the exhaustion of righteousness takes place as also the rising up of unrighteousness, then surely do I create myself (in the world).
For the protection of the good and the destruction of evil doer, for the firm establishment of righteousness am I born from age to age.”
Thus, the lord declares in the Gita the motive of all divine incarnations and the exact nature of the occasions on which such incarnations take place. If we believe in the ultimate control of the process of history by God, we have also to believe that His influence will be decisive at all critical moments in that process. The safeguarding of righteousness is ever His care: and whenever moral values are in serious danger, God descends into the world to protect the good and destroy the wicked.
Incarnation then is an uncommon but by no means an extremely rare phenomenon. At every parting of way in history, God must have guide in some way or other mankind into the right instead of the wrong path. The greater the crisis, the more apparent is the intervention of God. But it is not necessary to think that God normally stands aloof from the universe, a distant of interested spectator, and intervenes only when things go dangerously wrong. He is the Antaryamin (the internal controller) of every being in the universe, and according to the Purusha Sukta, the entire universe is an incarnation of God. And His guidance of the world at once ultimate and all pervasive. To recognize His influence, it is not necessary for us to wait for a momentous crisis in the affairs to men. For He is the very ground of values and whatever things are possessed of glory or power or beauty or special excellence of any kind are revelations of the glory of God. They have in them more than that usual fraction of the power of God which is at the root of all existence.
Such an incarnation in this age is our Lord Shri Sai Baba
Source Sai Sudha July 1941
Beautiful artical