
As quoted in "Louis Pasteur" in The Catholic Encyclopedia (1913)
As quoted in Letter to an Atheist (2007) by Michael Patrick Leahy, p. 61
His descendents, Louis-Pasteur Vallery-Radot, and Maurice Vallery-Radot disputed the authenticity of such statements. According to Maurice Vallery-Radot, Pasteur (1994), p. 378, the attributed assertion first appeared in the Semaine religieuse .... du diocèse de Versailles (6 October 1895), p. 153, shortly after the death of Pasteur.
Disputed
Variant: I have the faith of a Breton peasant and by the time I die I hope to have the faith of a Breton peasant's wife.