The true foundation of theology is to ascertain the character of God. It is by the aid of Statistics that law in the social sphere can be ascertained and codified, and certain aspects of the character of God thereby revealed. The study of statistics is thus a religious service.

Florence Nightingale (1820-1910) English social reformer, statistician, founder of modern nursing

(Attributed)

Attributed in F.N. David in Games, Gods, and Gambling: A History of Probability and Statistical Ideas (1962).

There is a related variant of this quote: "To understand God's thoughts we must study statistics, for these are the measure of his purpose." This appears to be a paraphrase by Francis Galton of her beliefs (in full in Karl Pearson, Life of Francis Galton, Vol. 2, ch. 13, sec. 1 (1924)). While Galton is describing her beliefs, the quotation is often rewritten from third to first person, as though it were something she said.