Dearest brother in Christ Jesus: I Catherine, a useless servant, comfort and bless thee and invite thee to a sweet and most holy patience, for without patience we could not please God. So I beg you, in order that you may receive the fruit of your tribulations, that you assume the armour of patience. And should it seem very hard to you to endure your many troubles, bear in memory three things, that you may endure more patiently. First, I want you to think of the shortness of your time, for on one day you are not certain of the morrow. We may truly say that we do not feel past trouble, nor that which is to come, but only the moment of time at which we are. Surely, then, we ought to endure patiently, since the time is so short. The second thing is, for you to consider the fruit which follows our troubles. For St. Paul says there is no comparison between our troubles and the fruit and reward of supernal glory. The third is, for you to consider the loss which results to those who endure in wrath and impatience; for loss follows this here, and eternal punishment to the soul.
From her most influential work, The Dialogue:
The soul, who is lifted by a very great and yearning desire for the honor of God and the salvation of souls, begins by exercising herself, for a certain space of time, in the ordinary virtues, remaining in the cell of self-knowledge, in order to know better the goodness of God towards her. This she does because knowledge must precede love, and only when she has attained love, can she strive to follow and to clothe herself with the truth. But, in no way, does the creature receive such a taste of the truth, or so brilliant a light therefrom, as by means of humble and continuous prayer, founded on knowledge of herself and of God; because prayer, exercising her in the above way, unites with God the soul that follows the footprints of Christ Crucified, and thus, by desire and affection, and union of love, makes her another Himself. Christ would seem to have meant this, when He said: To him who will love Me and will observe My commandment, will I manifest Myself; and he shall be one thing with Me and I with him.
The 'another Himself' phrase is, of course, an allusion to the common saying that a friend is another self.
