William Thomson, 1st Baron Kelvin Quote

Science is bound by the everlasting law of honour, to face fearlessly every problem which can fairly be presented to it. If a probable solution, consistent with the ordinary course of nature, can be found, we must not involve the abnormal act of Creative Power.

Popular Lectures and Addresses (Volume 2), Presidential Address to the British Association, Edinburgh, 1871, (pp. 199-200)