evidence: A leading phenomenon in human progress is, that every science is evolved out of its corresponding art. It results from the necessity we are under, both individually and as a race, of reaching the abstract by way of the concrete, that there must be practice and an accruing experience with its empirical generalizations, before there can be science. Science is organized knowledge; and before knowledge can be organized, some of it must first be possessed. Every study, therefore, should have a purely experimental introduction; and only after an ample fund of observations has been accumulated, should reasoning begin. [...] If we say that science is organized knowledge, we are met by the truth that all knowledge is organized in a greater or less degree—that the commonest actions of the household and the field presuppose facts colligated, inferences drawn, results expected—and that the general success of these actions proves the data by which they were guided to have been correctly put together. [...] In conclusion, Herbert Spencer coined "Science is organized knowledge". Thomas Henry Huxley should be credited with "Science is nothing but trained and organized common sense".