First, faith in Jesus is more than just believing in the person of Jesus alone, but it is believing in everything He taught, and commanded us. If we are not obeying Jesus, then we are not really believing in Him.
Jesus said,
“And why call ye me, Lord, Lord, and do not the things which I say?” (Luke 6:46).
All of the Bible is a part of the faith, and our Bible is filled with lots of commands that are a part of our Progressive Sanctification.
Romans 10:17 says faith comes by hearing and hearing the Word of God.
Hearing can also mean to obey.
Second, in Theology, there are three tenses of Sanctification. Here is a quote from an article:
A Christian can say, “I am sanctified, I am being sanctified, and I will be sanctified.” The Bible presents three tenses of sanctification:
- Past. Definitive or positional sanctification occurs when God sets people apart for himself at the moment they become Christians (e.g., Acts 20:32; 26:18; Rom 1:7; 6; 1Cor 1:2; 6:11; Eph 1:1; 5:3; Col 1:2, 12; 3:12; 2Thes 1:10; Heb 10:10, 14; Jude 3; Rev 13:7).
- Present. Progressive sanctification is the ongoing, incomplete, lifelong maturing process in which a Christian gradually becomes more holy (e.g., John 17:17; 2Cor 3:18; 7:1; Phil 1:6; 1Thes 4:3–4, 7; Heb 12:14; 2Pet 3:11).
- Future. Ultimate sanctification corresponds to glorification (e.g., Phil 3:21; 1Thes 3:13; 5:23; Jude 24). This happens after death when God sets his people apart from sin’s presence and possibility.
Source:
Models of Sanctification - The Gospel Coalition
(Note: I am in agreement only with this portion of the article. I am not in agreement with the author or the website because they are reformed or Calvinist; For I find Calvinism to be highly unbiblical and immoral; But for theological demonstrated purposes, I have quoted a truth that they just so happen to get right.).
Anyways, the best way of understanding the word “Sanctification” is that it is a cleansing or washing (like with water).
#1. We are cleansed (sanctified) of our past sins when we received Jesus and His grace,
#2. We are being cleansed (sanctified) in the Sanctification Process by putting away sin, living more holy, and doing good works over the course of our life by all three persons of the Godhead or Trinity working through us.
#3. We are being cleansed (sanctified) in having a new spiritual body when we are glorified and taken home to be with God (Note: We also one day later in the future also have a new physical flesh and blood body after the DNA of Jesus Christ, as well).