“And barbarians were inventors not only of philosophy, but almost of every art. The Egyptians were the first to introduce astrology among men. Similarly also the Chaldeans. The Egyptians first showed how to burn lamps, and divided the year into twelve months, prohibited intercourse with women in the temples, and enacted that no one should enter the temples from a woman without bathing. Again, they were the inventors of geometry. There are some who say that the Carians invented prognostication by the stars. The Phrygians were the first who attended to the flight of birds. And the Tuscans, neighbours of Italy, were adepts at the art of the Haruspex. The Isaurians and the Arabians invented augury, as the Telmesians divination by dreams. The Etruscans invented the trumpet, and the Phrygians the flute. For Olympus and Marsyas were Phrygians. And Cadmus, the inventor of letters among the Greeks, as Euphorus says, was a Phoenician; whence also Herodotus writes that they were called Phoenician letters. And they say that the Phoenicians and the Syrians first invented letters; and that Apis, an aboriginal inhabitant of Egypt, invented the healing art before Io came into Egypt. But afterwards they say that Asclepius improved the art. Atlas the Libyan was the first who built a ship and navigated the sea. Kelmis and Damnaneus, Idaean Dactyli, first discovered iron in Cyprus. Another Idaean discovered the tempering of brass; according to Hesiod, a Scythian. The Thracians first invented what is called a scimitar (arph), -- it is a curved sword, -- and were the first to use shields on horseback. Similarly also the Illyrians invented the shield (pelth). Besides, they say that the Tuscans invented the art of moulding clay; and that Itanus (he was a Samnite) first fashioned the oblong shield (qureos). Cadmus the Phoenician invented stonecutting, and discovered the gold mines on the Pangaean mountain. Further, another nation, the Cappadocians, first invented the instrument called the nabla, and the Assyrians in the same way the dichord. The Carthaginians were the first that constructed a triterme; and it was built by Bosporus, an aboriginal. Medea, the daughter of Æetas, a Colchian, first invented the dyeing of hair. Besides, the Noropes (they are a Paeonian race, and are now called the Norici) worked copper, and were the first that purified iron. Amycus the king of the Bebryci was the first inventor of boxing-gloves. In music, Olympus the Mysian practised the Lydian harmony; and the people called Troglodytes invented the sambuca, a musical instrument. It is said that the crooked pipe was invented by Satyrus the Phrygian; likewise also diatonic harmony by Hyagnis, a Phrygian too; and notes by Olympus, a Phrygian; as also the Phrygian harmony, and the half-Phrygian and the half-Lydian, by Marsyas, who belonged to the same region as those mentioned above. And the Doric was invented by Thamyris the Thracian. We have heard that the Persians were the first who fashioned the chariot, and bed, and footstool; and the Sidonians the first to construct a trireme. The Sicilians, close to Italy, were the first inventors of the phorminx, which is not much inferior to the lyre. And they invented castanets. In the time of Semiramis queen of the Assyrians, they relate that linen garments were invented. And Hellanicus says that Atossa queen of the Persians was the first who composed a letter. These things are reported by Seame of Mitylene, Theophrastus of Ephesus, Cydippus of Mantinea also Antiphanes, Aristodemus, and Aristotle and besides these, Philostephanus, and also Strato the Peripatetic, in his books Concerning Inventions. I have added a few details from them, in order to confirm the inventive and practically useful genius of the barbarians, by whom the Greeks profited in their studies. And if any one objects to the barbarous language, Anacharsis says, "All the Greeks speak Scythian to me." [...]”
His parents were pagans, and Clement was a convert to Christianity. In the Protrepticus he displays an extensive knowledge of Greek mythology and mystery religions, which could only have arisen from the practise of his family's religion.
Having rejected paganism as a young man due to its perceived moral corruption, he travelled in Greece, Asia Minor, Palestine and Egypt. Clement's journeys were primarily a religious undertaking. In Greece, he encountered an Ionian theologian, who has been identified as Athenagoras of Athens; while in the east, he was taught by an Assyrian, sometimes identified with Tatian, and a Jew, who was possibly Theophilus of Caesarea.
In around 180, Clement reached Alexandria, where he met Pantaenus, who taught at the Catechetical School of Alexandria. Eusebius suggests that Pantaenus was the head of the school, but it is controversial whether the institutions of the school were formalized in this way before the time of Origen. Proponents of a formalized leadership and succession suggest that Clement succeeded Pantaenus as leader of the school, and was succeeded himself by Origen. Clement studied under Pantaenus, and was ordained to the priesthood by Pope Julian before 189. Otherwise, virtually nothing is known of Clement's life in Alexandria. He may have been married, a conjecture supported by his writings. Clement's diet is also unknown, but he said some things that look down upon eating flesh such as, "It is good...neither to eat flesh" and that even the fumes from cooked flesh "darken the soul"; however he said non-vegetarians aren't sinning except in certain circumstances such as those who eat flesh with "gluttony" and he was not opposed to all instances of eating meat.
During the Severian persecutions of 202–203, Clement left Alexandria. In 211, Alexander of Jerusalem wrote a letter commending him to the Church of Antioch, which may imply that Clement was living in in Cappadocia at that time. The date and location of his death are unknown.