Possible Clues:

• Become accustomed again to study, by the skin of your teeth
• Study simply to make finer tunings
• You'll need to change your ways if you're so barely literate
• Change again if appropriate, after study
• Make further changes to study of impartiality?
• If that's all you can do, being barely literate, you'll have to change your ways
• If as it seems you are only barely literate, you will have to change your ideas
• One might barely read this so as to get it right again
• Make further changes to study in accordance with equity
• Study fair and make further amendment