While Speed was still with him, he wrote a long letter, which he put into his hands at parting, full of wise and affectionate reasonings, to be read when he should feel the need of it. He predicts for him a period of nervous depression--first, because he will be "exposed to bad weather on his journey, and, secondly, because of the absence of all business and conversation of friends which might divert his mind and give it occasional rest from the intensity of thought which will sometimes wear the sweetest idea threadbare, and turn it to the bitterness of death." The third cause, he says, "is the rapid and near approach of that crisis on which all your thoughts and feelings concentrate." If in spite of all these circumstances he should escape without a "twinge of the soul," his friend will be most happily deceived; but, he continues, "if you shall, as I expect you will at some time, be agonized and distressed, let me, who have some reason to speak with judgment on the subject, beseech you to ascribe it to the causes I have mentioned, and not to some false and ruinous suggestion of the devil." This forms the prelude to an ingenious and affectionate argument in which he labors to convince Speed of the loveliness of his betrothed and of the integrity of his own heart; a strange task, one would say, to undertake in behalf of a young and ardent lover. But the two men understood each other, and the service thus rendered was gratefully received and remembered by Speed all his life. Lincoln wrote again on the 3d of February, 1842, congratulating Speed upon a recent severe illness of his destined bride, for the reason that "your present distress and anxiety about her health must forever banish those horrid doubts which you feel as to the truth of your affection for her." As the period of Speed's marriage drew near, Lincoln's letters betray the most intense anxiety. He cannot wait to hear the news from his friend, but writes to him about the time of the wedding, admitting that he is writing in the dark, that words from a bachelor may be worthless to a Benedick, but still unable to keep silence. He hopes he is happy with his wife, "but should I be mistaken in this, should excessive pleasure still be accompanied with a painful counterpart at times, still let me urge you, as I have ever done, to remember in the depth and even agony of despondency, that very shortly you are to feel well again." Further on he says: "If you went through the ceremony calmly, or even with sufficient composure not to excite alarm in any present, you are safe beyond question," seeking by every device of subtle affection to lift up the heart of his friend.