might be translated as the driving force of the libido,[91] the δύναμις κινητική[92] of Zeno, could be made use of for social preservation.[93] It may be assumed most certainly that the domestication of humanity has cost the greatest sacrifices. An age which produced the stoical ideal must certainly have known why and against what it was created. The age of Nero serves to set off effectually the famous extracts from the forty-first letter of Seneca to Lucilius: “One drags the other into error, and how can we attain to salvation when no one bids us halt, when all the world drives us in deeper?” “Do you ever come across a man unafraid in danger, untouched by desires, happy in misfortune, peaceful in the midst of a storm, elevated above ordinary mortals, on the same plane as the gods, does not reverence seize you? Are you not compelled to say, ‘Such an exalted being is certainly something different from the miserable body which he inhabits?’ A divine strength rules there, such an excellent mind, full of moderation, raised above all trivialities, which smiles at that which we others fear or strive after: a heavenly power animates such a person, a thing of this kind does not exist without the coöperation of a deity. The largest part of such a being belongs to the region from which he came. Just as the sun’s rays touch the earth in reality and yet are at home only there from whence they come, so an eminent holy man associates with us. He is sent to us that we may learn to know the divine better, and although with us, still really belongs to his original home. He looks thither and reaches towards it; among us he walks as an exalted being.”