Isaiah 30:20
“And though the Lord give you the bread of adversity, and the water of affliction, yet shall not thy teachers be removed into a corner any more, but thine eyes shall see thy teachers:”
And therefore will the Lord wait, that he may be gracious unto you, and therefore will he be exalted, that he may have mercy upon you: for the Lord is a God of judgment: blessed are all they that wait for him.
For the people shall dwell in Zion at Jerusalem: thou shalt weep no more: he will be very gracious unto thee at the voice of thy cry; when he shall hear it, he will answer thee.
And though the Lord give you the bread of adversity, and the water of affliction, yet shall not thy teachers be removed into a corner any more, but thine eyes shall see thy teachers:
And thine ears shall hear a word behind thee, saying, This is the way, walk ye in it, when ye turn to the right hand, and when ye turn to the left.
Ye shall defile also the covering of thy graven images of silver, and the ornament of thy molten images of gold: thou shalt cast them away as a menstruous cloth; thou shalt say unto it, Get thee hence.
Counter-Arguments
The strongest case that this verse does not belong in this theme.

Cross-References
“Thus saith the Lord, thy Redeemer, the Holy One of Israel; I am the Lord thy God which teacheth thee to profit, which leadeth thee by the way that thou shouldest go.”
“And I will give you pastors according to mine heart, which shall feed you with knowledge and understanding.”
“Behold, the days come, saith the Lord God, that I will send a famine in the land, not a famine of bread, nor a thirst for water, but of hearing the words of the Lord:”
“Thou feedest them with the bread of tears; and givest them tears to drink in great measure.”
“And say, Thus saith the king, Put this fellow in the prison, and feed him with bread of affliction and with water of affliction, until I come in peace.”