《淮南子·人间训》
那鸿鹄还没从卵中孵化出来的时候，只须用一根手指头一戳，它就溃破而变得无影无踪了。但等到它筋骨生成，羽毛翅膀丰满，它就会振动翅翼，挥动羽毛，飞上浮云，背负青天，胸贴着红霞，翱翔在无边无际的天空，徜徉在彩虹之间，这时虽有强弩利箭，细缴长丝，再加上有蒲且子这样的神射手，也对付不了它。
夫鸿鹄之未孚于卵也，一指蔑之，则靡而无形矣；及至其筋骨之已就，而羽翮之既成也，则奋翼挥羽慧，凌乎浮云，背负青天，膺摩赤霄，翱翔乎忽荒之上，析惕乎虹霓之间。虽有劲弩利矰微缴，蒲且子之巧，亦弗能加也。
When the swan has not yet hatched from its egg, just poke it with a finger, and it will break and disappear. But when its muscles and bones are formed and its feathers and wings are plump, it will flap its wings, flap its feathers, fly to the floating clouds, carry the blue sky on its back, and clasp the rosy clouds to its chest, soaring in the boundless sky, wandering between the rainbows, at this time even though there are strong crossbows, sharp arrows, fine strands and long threads, plus a marksman like Buguz, can't deal with it.