Read this excerpted introduction to President Franklin Roosevelt's address to Congress in 1941 and answer the question. I address you, the members of this new Congress, at a moment unprecedented in the history of the union. I use the word "unprecedented" because at no previous time has American security been as seriously threatened from without as it is today.

Since the permanent formation of our government under the Constitution in 1789, most of the periods of crisis in our history have related to our domestic affairs. And, fortunately, only one of these -- the four-year war between the States -- ever threatened our national unity. Today, thank God, 130,000,000 Americans in 48 States have forgotten points of the compass in our national unity.

How are the themes from Roosevelt's introduction to his address and the excerpt from King's letter similar?

Click here to read "Letter from a Birmingham Jail."

Both assume that sacrifices bring rewards.
Both suggest that order can be created out of tension.
Both infer that struggles for internal justice are historical.
Both assert that attempts to seek freedom are constant.