Philosophy is to be studied, not for the sake of any definite answers to its questions, since no definite answers can, as a rule, be known to be true, but rather for the sake of the questions themselves; because these questions enlarge our conception of what is possible, enrich our intellectual imagination and diminish the dogmatic assurance which closes the mind against speculation. (Russel, 1959, p. 161) (p. 21)
Paul, J. L. (2005). Introduction to the philosophies of research and criticism in education and the social sciences. Upper Saddle River, N.J. : Pearson/Merrill/Prentice Hall, c2005.