The human mind always makes progress, but it is a progress in spirals.

Scientific progress makes moral progress a necessity; for if man's power is increased, the checks that restrain him from abusing it must be strengthened.

ô enfance du coeur humain qui ne vieillit jamais! voilà donc à quel degré de puérilité notre superbe raison peut descendre! Et encore est-il vrai que bien des hommes attachent leur destinée à des choses d'aussi peu de valeur que mes feuilles de saule.

Scientific progress makes moral progress a necessity; for if man's power is increased, the checks that restrain him from abusing it must be strengthened

To be totally understanding makes one very indulgent.

The human mind is our fundamental resource.