The source of lawlessness is the Sin Nature which we received as a result of spiritual death, at the time the fall of the human race with Adam. We practice lawlessness when we commit personal sin. But we have been redeemed from that bondage. Refers to ceremonial or religious or moral purification. The subjunctive mood indicates that purification is potential and conditional upon the faith of the individual in the work of Christ on the cross.
Positional purification is to be followed by temporal, or experiential, purification.
The Ephesians passage shows that He intends to present a spotless, pure church to Himself. And there is a direct relationship between New Testament teaching about purification and the Old Testament Jewish rituals of sacrifice, cleansing, and purification that took place on a daily basis in the tabernacle and the temple. It is imperative that a Christian understand these principles from the Word of God, and be able to correlate the Old and New Testament teachings so that they have a single message. This is the meaning chosen by the KJV translators here. A sect in England from 1838 into the early 20th Cent. was called The Peculiar People, or Plumstead's Peculiars.