As far as the laws of mathematics refer to reality, they are not certain; and as far as they are certain, they do not refer to reality.
Context / explanation
Quoted in Fritjof Capra, The Tao of Physics, ch. 2 (1975)
1953: Readings in the philosophy of science, Page 189, Publisher Appleton-Century-Crofts, Evidence
Chaos is the score upon which reality is written.Henry Miller
The difference between fiction and reality is that fiction has to make sense.Tom Clancy
Do not worry about your difficulties in Mathematics. I can assure you mine are still greater.Albert Einstein