Read Isaiah 50:4-9a
50:4 The Lord GOD has given me the tongue of a teacher, that I may know how to sustain the weary with a word. Morning by morning he wakens-- wakens my ear to listen as those who are taught.
50:5 The Lord GOD has opened my ear, and I was not rebellious, I did not turn backward.
50:6 I gave my back to those who struck me, and my cheeks to those who pulled out the beard; I did not hide my face from insult and spitting.
50:7 The Lord GOD helps me; therefore I have not been disgraced; therefore I have set my face like flint, and I know that I shall not be put to shame;
50:8 he who vindicates me is near. Who will contend with me? Let us stand up together. Who are my adversaries? Let them confront me.
50:9a It is the Lord GOD who helps me; who will declare me guilty?
In verse 4 the Hebrew is not totally clear - whether the writer has the "tongue of a teacher" or the "tongue of those who are taught".
A good teacher needs to be teachable. By listening to the Lord he learns enough to be able to "sustain the weary with a word."
In all of this he learns to stand strong against his adversaries.
Lord help me to listen:
Verse 4 - "Morning by morning he wakens — wakens my ear to listen as those who are taught."