Line 19 and 20 emphatically explain the word of Allah "He (Allah gives wisdom to whom He wills, and has given wisdom has certainly been given much good. And none will remember except those of understanding" (Q 2v 269)¹⁶
The Holy Prophet (SAW) said: "When Allah wishes good for someone, He bestows upon him the understanding of religion"¹⁷." These quotations state the importance of working by whatever Allah has bestowed on every 'Alim. In which by practicing it he will be the beloved of Allah. Ibn Taymiyah also
said.

" إنما العامل هو العالم¹⁸
Meaning:
"Indeed the knowledgeable person is the one that practice it"

The knowledgeable person indeed is the one that practices its. The mood of the poet changes about knowledge, and warns seriously for having Knowledge that deserves no practice. As-Sahili tells that a learned person without iota of piety is not save from Allah's questioning just because you have knowledge and people acknowledge it, then humble yourself as questioning of Almighty Allah surpasses your knowledge: put it into practice or impact others!

"Do not feel safe from Allah Questioning about it,
The approach "you had knowledge but did not put into practice"?

The prophet used to supplicate "O Allah, I ask for knowledge, acceptable action, and good provision (al-tirmidh related it"¹⁸

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16. A.A Yusuf: the Holy Qur;an, text, Translation and commentary 1963, Baerut Lebanon: Daru-Arabiyah.
17. Report by Al-Tirmidhi 2487
18. Adam Abdullah Al-Illori: Al Dinu Al-Nasihah 1999, islamic culture printing press, Agege. P.33