What counts in making a happy marriage is not so much how compatible you are, but how you deal with incompatibility.

-- Leo Tolstoy

The point of marriage is not to create a quick commonality by tearing down all boundaries; on the contrary, a good marriage is one in which each partner appoints the other to be the guardian of his solitude, and thus they show each other the greatest possible trust. A merging of two people is impossibility, and where it seems to exist, it is a hemming-in, a mutual consent that robs one party or both parties of their fullest freedom and development. But once the realization is accepted that even between the closest people infinite distances exist, a marvelous living side-by-side can grow up for them, if they succeed in loving the expanse between them, which gives them the possibility of always seeing each other as a whole and before an immense sky.

-- Rainer Maria Rilke

You must know again my reluctance to marry, my feeling that I shatter thereby chances in work which means so much to me. . . . In our life together I shall not hold you to any medieval code of faithfulness to me, nor shall I consider myself bound to you similarly. . . . I may have to keep some place where I can go to be myself now and then, for I cannot guarantee to endure at all the confinements of even an attractive cage.

-- Amelia Earhart, in a letter to her husband, George Palmer Putnam, on their wedding day