In isolated cases this valid meaning seems obvious and unmistakable. When the president with his opening words closes the session of the House of Representatives, instead of opening it, we are inclined to consider this error meaningful by reason of our knowledge of the circumstances under which the slip occurred. He expects no good of the assembly, and would be glad if he could terminate it immediately. The pointing out of this meaning, the interpretation of this error, gives us no difficulty. Or a lady, pretending to admire, says to another, "I am sure you must have messed up this charming hat yourself."[8] No scientific quibbles in the world can keep us from discovering in this slip the idea "this hat is a mess." Or a lady who is known for her energetic disposition, relates, "My husband asked the doctor to what diet he should keep. But the doctor said he didn't need any diet, he should eat and drink whatever _I_ want." This slip of tongue is quite an unmistakable expression of a consistent purpose. Ladies and gentlemen, if it should turn out that not only a few cases of slips of the tongue and of errors in general, but the larger part of them, have a meaning, then this meaning of errors of which we have hitherto made no mention, will unavoidably become of the greatest interest to us and will, with justice, force all other points of view into the background. We could then ignore all physiological and psycho-physiological conditions and devote ourselves to the purely psychological investigations of the sense, that is, the meaning, the purpose of these errors. To this end therefore we will not fail, shortly, to study a more extensive compilation of material. But before we undertake this task, I should like to invite you to follow another line of thought with me. It has repeatedly happened that a poet has made use of slips of the tongue or some other error as a means of poetic presentation. This fact in itself must prove to us that he considers the error, the slip of the tongue for instance, as meaningful; for he creates it on purpose, and it is not a case of the poet committing an accidental slip of the pen and then letting his pen-slip stand as a tongue-slip of his character. He wants to make something clear to us by this slip of the tongue, and we may examine what it is, whether he wishes to indicate by this that the person in question is distracted or fatigued. Of course, we do not wish to exaggerate the importance of the fact that the poet did make use of a slip to express his meaning. It could nevertheless really be a psychic accident, or meaningful only in very rare cases, and the poet would still retain the right to infuse it with meaning through his setting. As to their poetic use, however, it would not be surprising if we should glean more information concerning slips of the tongue from the poet than from the philologist or the psychiatrist.