... must say, since it is what we make it,—and we shall make it good. How can we exclude from the cognition of a truth a faith which is involved in the creation of the truth? M has its character indeterminate, susceptible of forming part of a thorough-going pessimism on the one hand, or of a meliorism, a moral (as distinguished from a sensual) optimism on the other. All depends on the character of the {103} personal contribution x. Wherever the facts to be formulated contain such a contribution, we may logically, ... — The Will to Believe - and Other Essays in Popular Philosophy • William James