What is king's conclusion in this passage?
he is shocked by the tension of protest
negotiation is better than protest.
he is not afraid of tension,
tension is necessary for growth.
you may well ask: "why direct action? why
sit ins, marches and so forth? isn't
negotiation a better path? " you are quite
right in calling for negotiation. indeed, this is
the very purpose of direct action. nonviolent
direct action seeks to create such a crisis and
foster such a tension that a community which
has constantly refused to negotiate is forced
to confront the issue. it seeks so to dramatize
the issue that it can no longer be ignored. my
citing the creation of tension as part of the
work of the nonviolent resister may sound
rather shocking. but i must confess that i am
not afraid of the word "tension." i have
done
intro

Tension is necessary for growth.

Explanation:

In his "Letter From Birmingham Jail", Martin Luther King eloquently wrote about the need to resort to such non-violent acts of protestations. He had been arrested for protesting against the issue of segregation in lunch counters and even in employment. His issue is to get equal rights and liberties for the blacks alongside their white citizens.

In the given passage, he stressed the need of non-violent forms to make his point across about the racial discrimination that his people are subjected to. Giving a reply for why there is "sit ins, marches and so forth", he claims that these are needed so that the tension brought by them through their act will pressurize the concerned authorities into paying attention to them. Since they are so reluctant "to negotiate", it left them (the protesters) no choice but to get their attention forcibly. They needed to be "forced to confront the issue" even if it creates tension. For tension is the only way they can make their point known and recognized, which he (King) admits he's "not afraid of".  And if it is the only way for progress, then so let it be.

taking into account that a theme is the central topic a text treats and can be developed through a story, play, poem etc. the following are themes that can be further developed:  

my best friend jeffrey has many unusual interests. (the story could be about each of the unususal interests)

once a man gives his soul over to evil, he can never go back. (this could be a saying or a proverb)

the three sheepdogs lay around the yard all day. (it could be developed detailing how each of these sheepdogs lay around)

a priest's collar has an unusual effect upon people. (it could be developed detailing the different effect upon people)

innocence is a powerful force in a world full of corruption. (it could be developed detailing how is a world full of corruption)

king lear is a play shakespeare wrote later. (it is just a sentence and doesnt give any idea or topic to be discussed in details.

evil often wears the disguise of innocence. (this could be a saying or a proverb)

the use of “as” in the example to draw the resemblance. some more examples of common similes are given below. common examples of simile. our soldiers are as brave as lions. her cheeks are red like a rose. he is as funny as a monkey. the water well was as dry as a bone. he is as cunning as a fox. simile introduces vividness into what we say.