When believers see Jesus, we shall be like Him. We shall be conformed to the image of Christ. Believers will one day be changed into the very likeness of Jesus. "We shall be like Him, for we shall see Him as He is" (1 John 3:2). That's the work of God in our lives. Until that day, the Lord is still working in us. Remember, we are a work in progress.
Every believer is becoming more and more like Jesus, but we have a long way to go. "For whom He foreknew, He also predestined to be conformed to the image of His Son" (Romans 8:29). That is when we are glorified in Christ at his coming. As far as God is concerned, we are still a work in progress.
Sanctification means we are becoming who we shall be in Christ. We are not there yet, so don't be too hard on yourself. From time to time, we may stumble and fall. We all do, but our Father in heaven will not forsake us (Hebrews 13:5). God will lift us up with His strong arms of love.
Be patient with other believers, when they stumble and fall. God is still working on them too. "Brethren, if a man is overtaken in any trespass, you who are spiritual restore such a one in a spirit of gentleness, considering yourself lest you also be tempted" (Galatians 6:1). Judging other believers doesn't help. Just remember, we are predestined to be conformed to the image of Christ. "We shall be like Him."