"In the continuous development of nature and spirit, Boutroux believes it is impossible to establish anything definitive that has eternal value. Man, therefore, who is the greatest exponent of progress, does not know what his progress is tending towards; he does not know, therefore, whether his progress is true progress. Everything disappears into the indeterminate, into confusion, and the sceptical conclusion presents itself as compelling. But no: Boutroux, like James before him, does not lose himself in negation at this point and wants to save himself from scepticism. And so negation itself is transformed into affirmation. It is precisely the indistinct, the confused that contains the reason for life: in it is love, faith, the ideal; in it is that powerful impulse that moves the poet, the artist, the scientist himself, for science would be nothing without faith. But religion thus attained is an empty religion, and the ideal thus established is an ideal that fades into nothingness. (Ugo Spirito, Il pragmatismo nella filosofia contemporanea, Vallecchi Editore, Firenze, 1921, cap. II pp. 150-151)"