Titus 1:15-16 To the pure all things are pure, but to those who are defiled and unbelieving nothing is pure; but even their mind and conscience are defiled. They profess to know God, but in works they deny Him, being abominable, disobedient, and disqualified for every good work.
Light and darkness cannot exist together. We are the temple of the Holy Spirit. Wherever we go, we go with Him. When as a Christian, you partake in wrong things willingly, it’s like chocking the Holy Spirit. 1 Corinthians 5:11 I meant that you are not to associate with anyone who claims to be a believer yet indulges in sexual sin, or is greedy, or worships idols, or is abusive, or is a drunkard, or cheats people. Don’t even eat with such people.
It is dangerous for you as a Christian to associate with somebody who is a Christian with one leg outside. It’s either you drag them in or they will drag you out. There is a difference between a churchgoer and one who have received Christ. There is a baby Christian and a mature Christian.
Hebrews 6:4-6 For it is impossible to bring back to repentance those who were once enlightened-those who have experienced the good things of heaven and shared in the Holy Spirit, who have tasted the goodness of the word of God and the power of the age to come- and who then turn away from God. It is impossible to bring such people back to repentance; by rejecting the Son of God, they themselves are nailing him to the cross once again and holding him up to public shame.
On the contrary be there for unbelievers who still leave in sin because you might be their ticket to salvation. You cannot avoid having unbelievers around you. Continue to pray for the fallen brothers or sisters so they can receive grace and be renewed.