The motive power of the safety-first movement is a realization of the fact that lives and limbs need not be sacrificed to any desired result… – The Anode by the Bureau of Safety of the Anaconda Copper Mining Co., March 1917
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. – Albert Einstein, Sidelights on Relativity