ranging them one by one, I may retain them in my memory. From this, therefore, whilst I desire to cherish the sayings of the Lord with all delight in my heart, the habit of waking has come upon me, even if there be nothing that I wish to think of. Thus, in some unaccountable way, when any custom is established, the old custom is changed, provided indeed you do not force it above measure, but as far as the measure of nature admits. For it is not possible to be altogether without sleep; otherwise night would not have been made for rest."
Chap. ii.—Curtailment of sleep.
Then I, when I heard this, said: "You have very well said, O Peter; for one custom is superseded by another. For when I was at sea, I was at first distressed, and all my system was disordered, so that I felt as if I had been beaten, and could not bear the tossing and tumult of the sea; but after a few days, when I had got accustomed to it, I began to bear it tolerably, so that I was glad to take food immediately in the morning along with the sailors, whereas before it was not my custom to eat anything before the seventh hour. Now, therefore, simply from the custom which I then acquired, hunger reminds me about that time at which I used to eat with the sailors; which, however, I hope to get rid of, when once another custom shall have been formed. I believe, therefore, that you also have acquired the habit of wakefulness, as you state; and you have wished at a fitting time to explain this to us, that we also may not grudge to throw off and dispense with some portion of our sleep, that we may be able to take in the precepts of the living doctrine. For when the food is digested, and the mind is under the influence of the silence of night, those things which are seasonably taught abide in it."
Chap. iii.—Need of caution.
Then Peter, being pleased to hear that I understood the purport of his preface, that he had delivered it for our advantage; and commending me, doubtless for the purpose of
