This quotation is frequently misattributed to Henri Bergson. Here is the most similar Bergson quotation I was able to find:
For, however extraordinary the coincidence, it becomes acceptable from the very fact that it is accepted; and we do accept it, if we have been gradually prepared for its reception.
– Henri Bergson in Laughter: An essay on the meaning of the comic, translated from the French by Cloudesley Brereton and Fred Rothwell, (New York: The Macmillan Company, 1914), p. 93. Originally published as Le rire: essai sur la signification du Comique, (Paris: Alcan, 1900).
"For, however extraordinary the coincidence"