Philo Judaeus Quod Deus Sit Immutabilis 4

[4] For the appropriate progeny of God are the perfect virtues, but that offspring which is akin to the wicked, is unregulated wickedness. But learn thou, if thou wilt, O my mind, not to bear children to thyself, after the example of that perfect man Abraham, who offered up to God "The beloved and only legitimate offspring of his soul," ¹ the most conspicuous image of self-taught wisdom, by name Isaac; and who gave him up with all cheerfulness to be a necessary and fitting offering to God. "Having bound," ² as the scripture says, this new kind of victim, either because he, having once tasted of the divine inspiration, did not condescend any longer to tread on any mortal truth, or because he saw that the creature was ^{3 4 5} unstable and moveable, while he recognised the unhesitating firmness existing in the living God, on whom he is said to have believed. ⁶