I think it's understandable that Milton would call the power of light "offspring of Heav'n first-born."

我认为弥尔顿,称光明的力量,是上帝最初的产物“

耶鲁公开课 - 弥尔顿课程节选

One would be characteristic of semi-nomadic pastoralists: the sacrifice of the first lamb born in the spring to the deity in order to procure favor and continued blessing on the flocks for the spring.

一种是具有半游牧人的特色：,他们把春天里的第一只羊羔献给神,为了获得神的偏爱,来年春天继续赐福。

耶鲁公开课 - 旧约导论课程节选

It's now exactly that power from which Milton has been excluded by virtue of his blindness -- light: "Hail holy Light, offspring of Heav'n first-born, / Or of th' Eternal Coeternal beam May I express thee unblam'd?"

而是弥尔顿已经被失明剥夺的一种力量,圣光，你是上帝最初的产物，永恒的光束,我是否可以向你表达我无限的敬意“

耶鲁公开课 - 弥尔顿课程节选