From Wikipedia, the Fount of All True Scholarship:  Philo of Alexandria (c. 25 BCE – c. 50 CE), also called Philo Judaeus, was a Hellenistic Jewish philosopher who lived in Alexandria, in the Roman province of Egypt. Philo used philosophical allegory to attempt to fuse and harmonize Greek philosophy with Jewish philosophy. His method followed the practices of both Jewish exegesis and Stoic philosophy. His allegorical exegesis was important for several Christian Church Fathers, but he has barely any reception history within Rabbinic Judaism. He believed that literal interpretations of the Hebrew Bible would stifle humanity's view and perception of a God too complex and marvelous to be understood in literal human terms.

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"At this time the whole household takes on the sanctity of a temple. The sacrifice becomes a seder meal. The invited guests cleanse themselves in water. They come not to fill their gullets with wine and their stomachs with food as at other symposia, but to celebrate with song, prayer (and story).”

"The whole people, old and young, ascend to the status of priests to conduct the holy service (the seder). For they all celebrate the great migration, when over 600,000 men and women happily exited from a land of cruelty and animosity towards strangers...”


haggadah Section: Maggid - Beginning
Source: A Different night Family Participation Haggadah