Can I go to heaven if I still sin after believing in Christ?
Yes, my dear friend, you will go to heaven, but if and only if you base your hope of heaven solely upon the finished work of our Lord Jesus Christ on Calvary’s cross. Remember that it is only by the grace of God through faith that any of us can claim that hope of heaven, because we are all sinners (Romans 3:23). Praise the Lord that if you have truly believed on the Lord Jesus Christ as your Savior and Lord, then your sins are all forgiven and you are on your way to heaven, and nothing can change that fact (Romans 8:38-39; John 6:37). The Bible clearly states to us that we are saved by grace alone through faith, and not by our own works of righteousness (John 3:16; Romans 10:9; John 5:24; Ephesians 2:8,9; Acts 16:31; Titus 3:5, and many more verses). We accept these truths by the authority of the Word of God, the Bible, and God cannot lie, as we read in Titus 1:2, “In hope of eternal life, which God, that cannot lie, promised before the world began.”
But now, my dear friend, if we are saved by His grace through faith, then not only are we forgiven, but it is just as true that the Holy Spirit now dwells in our hearts and we are born again, and from this point on, God purposes that we should be conformed to the very image of our Lord Jesus Christ (Romans 8:29; John 3:3-6; 1 Peter 1:23). As true believers, we have experienced a change (2 Corinthians 5:17), and this is true whether we feel it or not. As true Christians, we now have the Holy Spirit dwelling in our hearts, and we have a new nature within us which alone can please God. This new nature acts within us such that we want to do God’s will; that we truly desire to walk a holy walk in this world which has been ruined by sin, and it is the Spirit of God which gives us the power to act like a Christian and to be able to resist sin. We can, through faith, reckon ourselves to be dead to sin and alive to God through Christ Jesus our Lord (Romans 6:11-13).
Thus, all this being true, we should not be practicing sin in our lives. We might possibly sin once in a while because of the weakness of the flesh which remains in us while on earth, but if we are in Christ, we should never be guilty of practicing sin on a regular basis. When we do sin, we should have a conscience about that. At such times, our fellowship with God becomes strained, and like the naughty child before his father, we shrink from facing Him. this all should produce in us a desire to repent and to get right with God through confession of our sins. I do want to make certain that you understand that sin is always a very serious matter with the Lord, even if we are already saved. God hates sin, and there is always a temporal consequence of our sins. Though our souls are saved by faith, and this does not change, individual sins after salvation can result in sickness, death, or some serious trials in our lives related to our sins. But again, if we do sin, we must keep short accounts with God. We must repent and confess our sins as we are taught in 1 John 1:9, “If we confess our sins, he is faithful and just to forgive us our sins, and to cleanse us from all unrighteousness.” (SF) (697.5)