Nor is my principal intent to address all, but rather certain persons of our sacred Order of Mount Carmel of the primitive observance, both friars an… - John of the Cross

In a dark night, With anxious love inflamed, O, happy lot! Forth unobserved I went, My house being now at rest. TAKING these words, then, with reference to purgation, contemplation, or detachment, or poverty of spirit — these are, as it were, one and the same thing — they may be thus explained in this way, as if the soul were saying: In poverty, without protection and help1 in all my powers, the understanding in darkness, the will under constraint, the memory in trouble and distress, in the dark, in pure faith, which is the dark night of the natural faculties, the will alone touched by grief and affliction, and the anxieties of the love of God, I went forth out of myself, out of my low conceptions and lukewarm love, out of my scanty and poor sense of God, without being hindered by the flesh or the devil. 2. This was to me a great blessing, a happy lot, for by annihilating and subduing my faculties, passions, appetites,2 and affections — the instruments of my low conceptions of God — I went forth out of the scanty works and ways of my own to those of God; that is, my understanding went forth out of itself, and from human and natural3 became divine; for united to God in that purgation, it understands no more by its natural powers,4 but in the divine wisdom to which it is united. 3. My will went forth out of itself becoming divine, for now, united with the divine love, it loves no more meanly with the powers of its nature,5 but with the energy and pureness of the divine spirit. Thus the will acts now in the things of God, not in a human way, and the memory also is transformed in eternal apprehensions of glory. Finally, all the energies and affections of the soul are, in this night and purgation of the old man, renewed into a divine temper and delight.

CHAPTER II Of certain spiritual imperfections which beginners have with respect to the habit of pride. AS these beginners feel themselves to be very fervent and diligent in spiritual things and devout exercises, from this prosperity (although it is true that holy things of their own nature cause humility) there often comes to them, through their imperfections, a certain kind of secret pride, whence they come to have some degree of satisfaction with their works and with themselves. And hence there comes to them likewise a certain desire, which is somewhat vain, and at times very vain, to speak of spiritual things in the presence of others, and sometimes even to teach such things rather than to learn them. They condemn others in their heart when they see that they have not the kind of devotion which they themselves desire; and sometimes they even say this in words, herein resembling the Pharisee, who boasted of himself, praising God for his own good works and despising the publican.

Souls will be unable to reach perfection who do not strive to be content with having nothing, in such fashion that their natural and spiritual desire is satisfied with emptiness; for this is necessary in order to reach the highest tranquility and peace of spirit. Hence the love of God in the pure and simple soul is almost continually in act.