What is common between these two letters written by abraham lincoln?
1. Excerpt from a letter from Abraham Lincoln to J. C. Conkling

August 26, 1863

There are those who are dissatisfied with me. To such I would say: You desire peace, and you blame me that we do not have it. But how can we attain it? There are but three conceivable ways: First, to suppress the rebellion by force of arms. This I am trying to do. Are you for it? If you are, so far we are agreed. If you are not for it, a second way is to give up the Union. I am against this. Are you for it? If you are, you should say so plainly. If you are not for force, nor yet for dissolution, there only remains some imaginable compromise. I do not believe that any compromise embracing the maintenance of the Union is now possible. All I learn leads to a directly opposite belief. The strength of the rebellion is its military, its army. That army dominates all the country and all the people within its range. Any offer of terms made by any man or men within that range, in opposition to that army, is simply nothing for the present, because such man or men have no power whatever to enforce their side of a compromise, if one were made with them.

2. Excerpt from a letter written by Abraham Lincoln to Horace Greeley

August 22, 1862

As to the policy I "seem to be pursuing," as you say, I have not meant to leave any one in doubt. I would save the Union. I would save it in the shortest way under the Constitution. The sooner the national authority can be restored, the nearer the Union will be,—the Union as it was. If there be those who would not save the Union unless they could at the same time save slavery, I do not agree with them. If there be those who would not save the Union unless they could at the same time destroy slavery, I do not agree with them. My paramount object in this struggle is to save the Union, and not either to save or to destroy slavery.