v6 is telling us about Genesis 1:2, when the devil rebelled and took with him a third of the Sons of God, as some are described in Genesis 6 and the book of Jude. The first rebel was in the Garden of Eden called the 'tree of the knowledge of good and evil. So what can this knowledge of good and evil possibly be that the tree/serpent whispered into the woman's ear? We are not told anything about the creation of Lucifer/serpent/tree of the knowledge of good and evil by Moses only that he was in the Garden.
It is the holy prophets Isaiah 14:12-27 and Ezekiel 28:12-19 that tell us about the creation and the rebellion that caused Genesis 1:2 that cause this earth to become without form, and void; and darkness (another name given the tree of the knowledge of good and evil) was upon the face of the deep
Now Paul describes this 'time' in Ephesians 1:4 According as He hath chosen (election) us in Him *before* the 'foundation of the world', (foundation of the world is a verb that means casting down - overthrow and world is age) that we should be holy and without blame before Him in love.
Note it does not say we can be perfect but that our love for Him should be holy and without blame.
Now how can someone be chosen or of the election before the casting down - overthrow of an age if they did not exist. Paul is not describing the existence of the flesh, but instead of the soul/spirit during that world (age) that Peter says WAS, but perished being overflowed with water.
Interesting. Have a good night!