What does this paragraph means? what is the tone and the mood for the paragraph? like a boil that can never be cured as long as it is covered up but must be opened with all its pus-flowing ugliness to the natural medicines of air and light, injustice must likewise be exposed, with all of the tension its exposing creates, to the light of human conscience and the air of national opinion before it can be cured.

The answers are explained below.

Explanation:

In this excerpt, the rhetorical device called simile is very important (an explicit comparison of two things indicated with words such as "like" or "as") to determine the meaning since it compares injustice and how terrible it can be and make people feel. On the other hand, the tone and the mood are gruesome, first, and it seems to adopt a hopeful tone at the end when it introduces a solution to injustice.

is that the whole question?

he will find out what went wrong or happened and how.