James Clerk Maxwell Quote
But when we face the great questions about gravitation Does it require time? Is it polar to the 'outside of the universe' or to anything? Has it any reference to electricity? or does it stand on the very foundation of matter-mass or inertia? then we feel the need of tests, whether they be comets or nebulae or laboratory experiments or bold questions as to the truth of received opinions.
The Scientific Letters and Papers of James Clerk Maxwell: 1846-1862 (ed. CUP Archive, 1990) - ISBN: 9780521256254