In this keen and clear element, however, he has his entire power: here he can fly! Why should he again go down into those muddy waters where he has to swim and wade and soil his wings! No! There it is too hard for us to live! We cannot help it that we are born for the atmosphere, the pure atmosphere, we rivals of the ray of light; and that we should like best to ride like it on the atoms of ether, not away from the sun, but towards the sun! That, however, we cannot do- so we want to do the only thing that is in our power: namely, to bring light to the earth, we want to be “the light of the earth!” And for that purpose we have our wings and our swiftness and our severity, on that account we are manly, and even terrible like the fire. Let those fear us, who do not know how to warm and brighten themselves by our influence!
Nietzsche, The Gay Science