"Fourier’s theorem is not only one of the most beautiful results of modern analysis, but it is said to furnish an indispensable instrument in the treatment of nearly every recondite question in modern physics…Fourier is a mathematical poem." Lord Kelvin

"Mathematics compares the most diverse phenomena and discovers the secret analogies that unite them." Joseph Fourier

"The deep study of nature is the most fruitful source of mathematical discoveries." Joseph Fourier