Portion of a letter from Dickens to John Forster concerning separation from Catherine
"...Poor Catherine and I are not made for each other, and there is no help for it. It is not only that she makes me uneasy and unhappy, but that I make her so too -- and much more so. She is exactly what you know, in the way of being amiable and complying; but we are strangely ill-assorted for the bond there is between us. God knows she would have been a thousand times happier if she had married another kind of man, and that her avoidance of this destiny would have been at least equally good for us both. I am often cut to the heart by thinking what a pity it is, for her own sake, that I ever fell in her way; and if I were sick or disabled to-morrow, I know how sorry she would be, and how deeply grieved myself, to think how we had lost each other. But exactly the same incompatibility would arise, the moment I was well again; and nothing on earth could make her understand me, or suit us to each other. Her temperament will not go with mine. It mattered not so much when we had only ourselves to consider, but reasons have been growing since which make it all but hopeless that we should even try to struggle on. What is now befalling me I have seen steadily coming, ever since the days you remember when Mary was born; and I know too well that you cannot, and no one can, help me. Why I have even written I hardly know; but it is a miserable sort of comfort that you should be clearly aware how matters stand. The mere mention of the fact, without any complaint or blame of any sort, is a relief to my present state of spirits -- and I can get this only from you, because I can speak of it to no one else."