St. John was born at Ri, France, November 14, 1601; he made brilliant studies at Caen; became an Oratorian and a priest; founded in 1641, the Congregation of Our Lady of Refuge (Good Shepard Nuns); left the Oratory and founded, in 1643, the Society of Jesus and Mary (Eudist) for the education of priests and for missionary work; instituted the feasts of the Hearts of Jesus and Mary; wrote a number of ascetical books; died at Caen, August 19, 1680.

He was noted as a preacher and for his great love of God. He made a special vow always to do what was most pleasing to God. In the confessional all the fire of his pulpit oratory disappeared and he was as gentle as a lamb.

(Source: The New Roman Missal, Rev. F. X. Lasance)