INTRODUCTION     

SAINT TERESA began to write the Interior Castle on June 2, 1577, Trinity Sunday, and completed it on the eve of St. Andrew, November 29, of the same year. But there was a long interruption of five months, [1]so that the actual time spent in the composition of this work was reduced to about four weeks--a fortnight for the first, and another fortnight for the second half of the book. The rapidity with which it was written is easily explained by the fact that the Saint had conceived its plan some time previously. On January 17, 1577, she had written to her brother, Don Lorenzo de Cepeda, at Avila: I have asked the bishop--Don Alvaro Mendoza--for my book (the Life) because I shall perhaps complete it by adding those new favours our Lord has lately granted me. With these one may even compose a new work of considerable size, provided God grants me the grace of explaining myself; otherwise the loss will be of small account.' [2] 

     She never asked for permission to write anything, but waited until she received a command from her superiors, which, in this case, came from Father Jerome Gracian, superior of the Discalced J. Carmelites of the Provinces of Andalusia and Castille, and from Don Alonso Velasquez, canon of Toledo, afterwards bishop of Osma. [3]   

     The Saint was not in good health at the time; she repeatedly complains of noises in the head and other infirmities, but, worst of all, she was weighed down by troubles and anxieties resulting from the action of the superiors of the Order and of the Papal Nuncio against the nuns and friars of the Reform. Matters became even more serious when, in October, the nuns of the Incarnation of Avila proceeded to the election of a new prioress. Notwithstanding the prohibition of the provincial, fifty-five electors recorded their votes in favour of the Saint and were immediately declared excommunicated. The whole work of the Reform seemed on the brink of ruin, the Saint, as well as all her friends, was in disgrace, subject to obloquy and ill-treatment.

     No trace of these trials is to be found in the Interior Castle. Saint Teresa possessed the power of concentration of thought in a marvellous degree. The early mornings and late evenings were devoted to the composition of the book, while the rest of the day was taken up by the affairs of the Order. Mother Mary of the Nativity, a member of the community of Toledo, where the book was begun, declared afterwards, [4] that she often saw her writing, generally after Holy Communion, her face resplendent, with such rapidity and so absorbed in her occupation that she seemed undisturbed by, and in fact quite unconscious of, any noise that was made. Mother Mariana of the Angels [5]   reports having heard from the same witness, that entering her cell one day to deliver a message, the holy Mother was just beginning a new sheet of her book. While taking off her spectacles to listen to the message she was seized by a trance in which she remained for several hours. The nun, terrified at this, did not stir, but kept her eyes steadily on the Saint. When she came to, it was seen that the paper, previously blank, was covered with writing. Noticing that her visitor had discovered it, Saint Teresa put the paper quietly in the box. Another nun, Mary of St. Francis, left the following declaration: I know that our holy Mother wrote four books, the Life, the Way of Perfection, the Foundations, and the Mansions, which I have seen her writing. Once, while she was composing the last-named work, I entered to deliver a message, and found her so absorbed that she did not notice me; her face seemed quite illuminated and most beautiful. After having listened to me she said: "Sit down, my child, and let me write what our Lord has told me ere I forget it," and she went on writing with great rapidity and without stopping.' [6]
     Mary of St. Joseph says she heard from Mary of the Nativity that Father Jerome Gracian commanded the Saint to write the Mansions; she, however, begged to be excused, because so many books having been written by holy and learned men, there remained nothing for a woman to write. At length she yielded under obedience. This nun (Mary of the Nativity) was frequently in the Saint's cell while she was writing and she noticed her resplendent face and the almost preternatural velocity with which her hand travelled over the paper. [7]
      Writing to Mother Mary of St. Joseph, Prioress of Seville, November 8, 1581, St. Teresa gives her a message for Father Rodrigo Alvarez, S. J.: Our Father (Jerome Gracian, then provincial) tells me that he has handed you a book written by me, which perhaps you do not feel inclined to read yourself. Kindly read to Father Rodrigo Alvarez, at his next visit, the last Mansion, but under the seal of confession, as he asks this in his superior wisdom. This is only for you two. Tell him that the person he knows has arrived at this Mansion and enjoys the peace there described; that she is entirely at rest, and that some grave theologians have assured her that she is on a safe road. In case you could not read these pages to him do not send him the book, for it might lead to unpleasantness. Until I have his answer on this matter I will not write to him. Give him my compliments.'
 At the end of the original manuscript, before the epilogue (marked with Ihs.) there is a notice in Father Alvarez' hand-writing to this effect: The Mother Prioress of the convent of Seville has read to me this seventh Mansion, whither a soul may arrive in the present life. Let all the saints praise the infinite goodness of God, Who communicates Himself to His creatures so that they truly seek His glory and the salvation of their neighbour. What I feel and judge of this matter is, that everything that has been read to me is conformable to Catholic truth and in accordance with Holy Scripture and the teaching of the Saints. Whosoever has read the doctrine of the Saints, such as the books of St. Gertrude, St. Catharine of Siena, or St. Bridget of Sweden, and other saints and spiritual writers, will clearly understand that the spirit of Mother Tireza (sic) of Jesus is true, since it leads to the same effects as are to be found in the saints; and because this is in truth my judgment and opinion, I have hereunto set my name, this, the 22nd day of February, 1582. P. Rodrigo Alvarez.' [8]
 The work was copied, probably under the supervision of the Saint, who introduced many changes; when completed the original was handed to Father Jerome Gracian and to the Dominican, Fray Diego de Yanguas, for approval. Both, particularly the former, made numerous corrections, which Fuente, not without reason, calls impertinent, scratching out whole sentences and adding others. The book thus revised must have enjoyed a certain celebrity, though not to the same extent as the Life, to which St. Teresa herself preferred it. Scarcely a week after its completion she wrote to Father Salazar, S.J.: If Señor Carillo [Salazar himself] came, the person in question [the Saint] thinks he would find another jewel which in her opinion is superior to the former [the Life]. This one reflects nothing foreign to itself, but is resplendent in its own beauty. It is enriched with more delicate enamels than the former, the workmanship, too, is more perfect. For, as the person in question says, the jeweller was less experienced when he fashioned the previous one. Moreover, the gold of the new one is of better quality than that of the former, though the precious stones are not so well set. It has been done, as might be expected, according to the designs of the Jeweller Himself.' [9]   Later on she wrote to Father Jerome Gracian: The book I have written since seems to me superior [to the Life]; at least I had more experience when I wrote it.' [10]