Trinity Evangelical (now Trinity International) did a study in the 1990s which concluded that it took about 5 years of solid, daily, consistent and challenging Bible study and application to discern a difference in their "test group."
Three years after establishing the church in Corinth, Paul, the Apostle admonished the believers. He fully expected them to have developed in their sanctification. He admonished them in 1 Cor 3.1-2 "Brothers and sisters, I could not address you as people who live by the Spirit but as people who are still worldly?mere infants in Christ. I gave you milk, not solid food, for you were not yet ready for it. Indeed, you are still not ready."
Later, Peter says "make every effort." 2 Peter 1:5ff "For this very reason, make every effort to add to your faith goodness; and to goodness, knowledge; 6 and to knowledge, self-control; and to self-control, perseverance; and to perseverance, godliness; 7 and to godliness, mutual affection; and to mutual affection, love. 8 For if you possess these qualities in increasing measure, they will keep you from being ineffective and unproductive in your knowledge of our Lord Jesus Christ. 9 But whoever does not have them is nearsighted and blind, forgetting that they have been cleansed from their past sins.
10 Therefore, my brothers and sisters,[a] make every effort to confirm your calling and election. For if you do these things, you will never stumble, 11 and you will receive a rich welcome into the eternal kingdom of our Lord and Savior Jesus Christ."
So, the questions are: "Does Sanctification require effort?" "What are the efforts?"
Three years after establishing the church in Corinth, Paul, the Apostle admonished the believers. He fully expected them to have developed in their sanctification. He admonished them in 1 Cor 3.1-2 "Brothers and sisters, I could not address you as people who live by the Spirit but as people who are still worldly?mere infants in Christ. I gave you milk, not solid food, for you were not yet ready for it. Indeed, you are still not ready."
Later, Peter says "make every effort." 2 Peter 1:5ff "For this very reason, make every effort to add to your faith goodness; and to goodness, knowledge; 6 and to knowledge, self-control; and to self-control, perseverance; and to perseverance, godliness; 7 and to godliness, mutual affection; and to mutual affection, love. 8 For if you possess these qualities in increasing measure, they will keep you from being ineffective and unproductive in your knowledge of our Lord Jesus Christ. 9 But whoever does not have them is nearsighted and blind, forgetting that they have been cleansed from their past sins.
10 Therefore, my brothers and sisters,[a] make every effort to confirm your calling and election. For if you do these things, you will never stumble, 11 and you will receive a rich welcome into the eternal kingdom of our Lord and Savior Jesus Christ."
So, the questions are: "Does Sanctification require effort?" "What are the efforts?"