The work of Philo of Alexandria (also called Philo Judaeus) is the most prominent and philosophically accomplished example of the Jewish-Hellenistic syncretism that flourished at Alexandria beginning at least as early as the translation of the Hebrew Scriptures into Greek (the Septuagint), during the reign of Ptolemy II Philedelphus (285-247 B.C.).
We already detect the influence of Hellenistic philosophy on Jewish thought in the biblical book of Ecclesiastes, and the later apocryphal work Wisdom of Sirach (ca. 30 B.C.) displays Platonic and Pythagorean affinities. So it is clear that by Philo's time Jewish thinkers of the Diaspora were quite comfortable with Greek philosophy. In the work of Philo himself there is an attempt to square Old Testament theology with the Greek philosophical tradition, leading Philo to posit Moses as the first sage and teacher of the venerable ancients of the Greek tradition. The work of Philo was to have an immense influence on emerging Christian philosophy, especially in the work of Origen.
According to Philo, God transcends all first principles, including the Monad, is incorporeal and cannot even be said to occupy a space or place; He is eternal, changeless, self-sufficient and free from all constraint or necessity (cf. Tripolitis 1978, pp. 5-6 ff.). God freely willed the creation of the cosmos, first in a purely intellectual manner, and then, through the agency of His Logos (Philo's philosophical term for the Wisdom figure of Proverbs 8:22) He brought forth the physical cosmos. Philo describes the Logos in a two-fold manner, first as the sum total of the thoughts of God, and then as a hypostatization of those thoughts for the purpose of physical creation. Thus we see Philo linking the cosmos to the intellectual realm by way of a mediating figure rather like the Platonic World-Soul. Borrowing a term from Stoic philosophy, Philo calls the thoughts of the Logos "rational seeds" (logoi spermatikoi), and describes them as having a role in the production of the cosmos which, he insists, was brought into being out of non-being by the agency of God.
Philo adhered to standard Platonism when he declared that the cosmos is a copy of the purely intellectual realm. However, he taught, following biblical doctrine, that the cosmos was created in time, but went on to state that, although having a temporal creation, the cosmos will exist eternally, since it is the result of God's outpouring of love. The rational beings dwelling in the cosmos are divided by Philo into three types: the purely intellectual souls (created first by God), all animals (created second), and finally man (last of all rational creation, combining the attributes of the first two). Of the purely intellectual and incorporeal souls, Philo recognized varying degrees of perfection; some of the souls aid humanity, for example, providing guidance and giving signs, while other fell into vice themselves, and aim to lead man astray. These are the beings called angels by the Jews and daemons by the Greeks.
Philo's ethical doctrine emphasized the free will of human beings. According to Philo, the meaning of the biblical statement that humanity is created in the image and likeness of God is that although sometimes constrained by external forces, all human souls are capable of overcoming these constraints and attaining freedom. He further adds, in a formulation that was to have a profound influence on Origen, that God aids souls in their quest for freedom in proportion to their love and devotion for Him and for their fellows