The task to testify to the gospel of Grace
Acts 20:24 (ASV)
24But I hold not my life of any account as dear unto myself, so that I may accomplish my course, and the ministry which I received from the Lord Jesus, to testify the gospel of the grace of God.
Dongaru was not only illiterate and blind, but also leprous—yet his disabilities not withstanding, he was a bold witness for the gospel of Christ. To the caste and low caste, he preached the good news he had come to believe!