“You ought not to brood and dream, Engineer,” Settembrini interrupted him. “You must resolve to trust to the instincts of your youth and your blood, urging you in the direction of action. And also your training in natural science is bound to link you to progressive ideas. You see, through the space of countless ages, life developing from infusorium up to man: how can you doubt, then, that man has yet before him endless possibilities of development? And in the sphere of the higher mathematics, if you would rest your case thereon, then follow your cycle from perfection to perfection, and, from the teaching of our eighteenth century, learn that man was originally good, happy, and without sin, that social errors have corrupted and perverted him, and that he can and will once more become good, happy, and sinless, by dint of labour upon his social structure⁠—”