Answer:
Annie is frustrated by Helen's behavior and feels she must be taught discipline.
Step-by-step explanation:
This is true going by the fact that, Helen has been giving Annie serious issue with her behavior. To her, the more she tries to point Helen in the right direction, the more frustrated she becomes.
The letter is an attempt to show that, the only way Helen could be able to gain knowledge is true being obedient to her parents especially her rather than being stubborn. This could be seen in her quote below:
......"The, more, I, think, the, more, certain, I, am, that, obedience, is, the, gateway, through, which, knowledge, enters, the, mind, of, the, child—".. ....