Synesius of Cyrene (c.370-c.413) was a Neo-Platonic philosopher who became bishop of Ptolemais in the Cyrenaica. He left behind a small corpus of texts that offer much information about daily life in Late Antiquity, and about the christianization of the Roman world.
Synesius' On dreams consists of two parts:
- A philosophical explanation why dreams allow our soul to reach higher spheres, based on a doctrine that is derived from the philosophical school known as Stoa (sections1-7);
- A more down-to-earth, and very accessible, account of the way one must investigate one's dreams, which boils down to keeping a "night book"(section 8-13).
The text is offered here in the translation by A. Fitzgerald. The four-digit numbers are page numbers of the Migne edition.
Synesius, On dreams 2
 Let the foregoing be proof that divinations are amongst the best vocations of man; and if all things are signs appearing through all things, inasmuch as they are brothers in a single living creature, the cosmos, so also they are written in characters of every kind, just as those in a book some are Phoenician, some Egyptian, and others Assyrian.note["Some are Phoenician, some Egyptian, and others Assyrian." The first refers to the normal alphabet, the second to hieroglyphic, and the third is a bit mysterious. Usually, "Assyrian writing" refers to Aramaic, but in this context, the twenty-something characters are already referred to as "Phoenician". This forces us to assume that Synesius refers to cuneiform. If this is correct, this is one of the last references to the ancient script of Mesopotamia.]
 The scholar reads these, and he is a scholar who learns by his natural bent. One reads some of them and another reads others, one reads more and another less. In the same way one reads them by syllables, another reads the complete phrase, another the whole story. In like manner do the learned see the future, some understanding stars, and of these, one the fixed stars, another those flames which shoot across the sky. Again, there are those who read it from the entrails, and from the cries of birds, and from their perches and flights. To others also what are termed omens are manifest, written indications these of things to be, and again voices and encounters otherwise intended, for all things have their significance for every one.  In the same way, if birds had had wisdom, they would have compiled an art of divining the future from men, just as we have from them; for we are to them, just as they are to us, alike young and old, very old and very fortunate. It must needs be, I think, the parts of this great whole, since it all shares one feeling and one breath, belong to each other. They are, in fact, limbs of one entire body, and may not the spells of the magicians be even such as these? Obviously, for charms are cast from one part of it to another, as signals are given, and he is a sage who understands the relationship of the parts of the universe. One thing he attracts to himself through the agency of another thing, for he has present with him pledges of things which are for the most part far away, to wit, voices, substances, figures. And as when the bowel is in pain, another part suffers also with it, so a pain in the finger settles in the groin,note[Plato, Republic 462C.] although there be many organs between these parts which feel nothing.
 This is because they are both portions of one living organism, and there is that which binds them one to the other more than to other things. Even to some god, of those who dwell within the universe, a stone from hence and a herb is a befitting offering; for in sympathizing with these he is yielding to nature and is bewitched. Thus the harp-player who has sounded the highest note does not sound the sesquioctavus next, but rather strikes the epitrite and the nete, a heritage today from a more ancient state of harmony.
 But there is in the cosmos, even as in human relationship, a certain discord also; for the universe is not one homogeneous thing but a unity formed of many. There are parts of it which agree and yet battle with other parts, and the struggle of these only contributes to a harmonious unity of the whole, just as the lyre is a system of responsive and harmonious notes.note[Plato, Timaeus 36A-B.] The unity resulting from the opposites is the harmony of both the lyre and the cosmos. Archimedes the Sicilian asked for a point of support outside of the earth wherefrom he might prop himself against the whole earth, for he said that as long as he was himself upon the earth he had no power over it. But the man, howso great his knowledge of the nature of the universe may be, once placed outside of it, could no longer make any use of his wisdom. He uses the universe against itself; accordingly his touch with it once lost, he will watch it in vain, and the lifeless symbols only would then be recorded. And small wonder, for whatever of the divine elements is outside the cosmos can in no wise be moved by sorcery.
He sits apart and careth not. nor taketh any thought thereof.note[Homer, Iliad 15.106.]
 It is the nature of pure reason not to be deflected; it is only the emotional element which may be cajoled. Wherefore the multitude of things in the universe and their relationship furnish the bulk of the subject-matter in the initiations and prophecies. There is a multitude of the discordant elements, but a relationship is the unity of things existing. Now, as to initiations, let not our law-abiding discourse noise them abroad; there is no offense, however, in explaining divination.