No one who denies that they sin can walk by the Spirit.
Jesus told Peter, "If I do not wash you, you have no part with Me."
Was Peter already a believer? Of course he was. Then why would Jesus need to wash him?
Jesus explains: "He who has bathed (i.e. has been saved) needs only to wash his feet. (i.e. to be cleansed from current sins), but is completely clean; and you are clean, but not all of you." For He knew the one who was betraying Him; for this reason He said, "Not all of you are clean."
So we know from these words of Jesus that He is speaking of a spiritual "cleanness" (like 11 of the apostles) vs. a spiritual "uncleanness"(like Judas).
So one who is spiritually clean, or saved, STILL needs to "wash his feet" (to be cleansed of current sins) DAILY.
Remember in the Lord's prayer Jesus said "Give us this day our daily bread." Matthew 6:11
So we know that we are to pray daily, and the very next verse, verse 12 says "And forgive us our debts (sins), as we also have forgiven our debtors."
So we see that, even though we are saved, we are to ask God to forgive us of our current sins each and every day.
