Sri Jnanadev or Jnaneshwar, Poet and Yogi, Jnani and Bhakta, was on this earth for about twenty years, nearly seven hundred years ago. His brief life was a divine event. Jnaneshwar Maharaj had, at a very young age, a vision of the Light of Knowledge and he gave discourses on the Gita which came to be known as Bhavartha Dipika or Jnaneshwari, bringing to light the deeper meaning and hidden significance of the dialogue between the Blessed Lord and Arjuna.
Those who grumble at the little thing that has fallen to their lot to do will grumble at everything. Always grumbling, they will lead a miserable life, and everything will be a failure. But those who do their duties as they go, putting their shoulders to the wheel, will see the light, and higher duties will fall to their share.
-Swami Vivekananda