3 You are already clean because of the word which I have spoken to you. John 15:3 (LSB)
All people are born dead in their trespasses and sins. (Ephesians 2:1; Colossians 2:13) This condition of spiritual death also means that each person, though desperate for fulfillment that can only be satisfied in God, cannot come to God, know God, or even seek Him. Because of this, they pursue fulfillment from everything around them. The number one method of doing this is via the flesh. The flesh is all about self and self-gratification. The problem with this is that nothing works for very long, including religiosity.
Genuine Christians are regenerate. (Titus 3:5) That means that they are new creations. (2 Corinthians 5:17) That means that the old things have passed away and all things have become new.
17 Therefore if anyone is in Christ, he is a new creation; the old things passed away; behold, new things have come. 2 Corinthians 5:17 (LSB)