Luke 1:37 → Job 10:13

Gabriel closes the annunciation with a confession rather than an argument: οὐκ ἀδυνατήσει παρὰ τοῦ θεοῦ πᾶν ῥῆμα - "no word from God will ever fail" (Luke 1:37). The verb is ἀδυνατέω (G101), and the Septuagint of Job 10:13 puts the same verb in Job's mouth: "having these things in Yourself, I know that You are able to do all things, and nothing is impossible for You (ἀδυνατεῖ δέ σοι οὐθέν)" - a clause the Greek translator supplies where the Hebrew has only "I know that this was in Your mind," and which Job repeats at 42:2. The lexical contact is therefore real and checkable, but its direction needs care. Luke's syntax - ἀδυνατέω with παρά, θεός, and ῥῆμα - is lifted from Genesis 18:14 LXX, the word spoken over Sarah at the tent door, which is why Elizabeth's pregnancy is attached as the sign one verse earlier (Luke 1:36). Job 10:13 is not the source; it is a fellow witness. And that is what makes the pairing worth keeping. This one verb carries a single confession across the whole canon - Abraham's tent (Genesis 18:14), Job's ash-heap (Job 10:13; 42:2), Jeremiah's prison courtyard (Jeremiah 32:17, 27), the ruined Jerusalem of Zechariah 8:6 - and Luke sets the incarnation inside that line, then has Jesus apply it to salvation itself: "what is impossible with men is possible with God" (Luke 18:27). The difference between the two ends of the thread is everything. Job says it in the dark, against God, as a complaint: You can do anything, and what You have concealed in Your heart is crushing me. Mary hears it in the light, as an answer: what God has been concealing in His heart is a Son. The omnipotence Job could only confess without understanding turns out to have been aimed the whole time at a manger - which means God's power is not merely unlimited but kind, and worth wanting rather than merely worth fearing.