לָכֵ֗ן הִנְנִ֥י יוֹסִ֛ף לְהַפְלִ֥יא אֶת־הָֽעָם־הַזֶּ֖ה הַפְלֵ֣א וָפֶ֑לֶא וְאָֽבְדָה֙ חָכְמַ֣ת חֲכָמָ֔יו וּבִינַ֥ת נְבֹנָ֖יו תִּסְתַּתָּֽר׃ (ס)
maka sebab itu, lihatlah, Aku akan kembali melakukan hal yang ajaib terhadap bangsa ini, keajaiban di atas keajaiban; hikmat orang-orang berhikmatnya akan lenyap, dan pengertian orang-orang yang berpengertian di antara mereka akan tersembunyi.
Radak
Thou maintainest my lot (is): – Thou didst help me when I chose this inheritance for myself, as they say (Babli, Yoma 38b): “He who comes to be cleansed is helped (by Heaven).” And the word, תומיך (maintainest) is written with hireq equivalent to sire; and so “Behold, I add (יוסף) to thy days” (Isaiah 38:5); “Behold, I add (יוסף) to do a marvellous work” with hireq equivalent to sere (ibid. 29:14).
Rabbeinu Bahya
The reason that this paragraph appears next to that of the smashing of the Tablets is to teach us that the loss of Torah scholars is as great a loss for the Jewish people as the smashing of the Tablets was at the time. Our sages in Eychah Rabbati 1,39 interpreted Isaiah 29,14: “truly, I shall further baffle this people with bafflement upon bafflement; and the wisdom of its wise shall fail, and the prudence of its prudent shall vanish,” as describing the loss of its Torah scholars as twice as painful for the Jewish people as the destruction of The Temple. The word הפלאה (bafflement) occurs in the curses of Deuteronomy only in a single form. Only in Isaiah, when referring to the Torah scholars is the word repeated, i.e. is the absence of such Torah scholars described as the greatest possible affliction for the people.
Rambam Introduction to the Mishnah
And all the more so, us; as wisdom has disappeared from us. And [it is] like the prophet informed us (Isaiah 29:14), "And the wisdom of its wise shall fail, and the understanding of its sage shall vanish" – the verse identified each one of us with four things: weakness of intellect; strengthening of desire; laziness in seeking wisdom and alacrity in benefit from the world – 'the four bad afflictions.' And how can we not attribute the lack to ourselves when we evaluate [ourselves in comparison] to them?