Mathematics is the only good metaphysics. – William Thomson Baron Kelvin of Largs

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

The human mind has never invented a labor-saving machine equal to algebra. – Author Unknown

You may be an engineer if your idea of good interpersonal communication means getting the decimal point in the right place. – Author Unknown