The Veil

I am on the edge of mysteries and the veil is getting thinner and thinner.

-- Louis Pasteur (27 December 1822 - 28 September 1895), French microbiologist, chemist, and inventor of the process of Pasteurization, Letter (December 1851), as quoted in The Great Influenza: The Epic Story of the Deadliest Plague In History (2004) by John M. Barry