Jesus tells us that in the “last days” before He returns to rule and reign there will be false apostles, deceitful workmen, disguising themselves as apostles of Christ. They are under the power of Satan and we know he disguises himself as an angel of light. So it is no surprise that his servants, also, disguise themselves as servants of righteousness.
“For such men are false apostles, deceitful workmen, disguising themselves as apostles of Christ. And no wonder, for even Satan disguises himself as an angel of light. So it is no surprise if his servants, also, disguise themselves as servants of righteousness.” 2 Corinthians 11-15
We need to recognise that the true battle is in the heavenly places and it is against the spiritual forces of evil which is why we are told to put on the full armour of God daily.
“For we do not wrestle against flesh and blood, but against the rulers, against the authorities, against the cosmic powers over this present darkness, against the spiritual forces of evil in the heavenly places.” Ephesians 6:12
“Stand therefore, having fastened on the belt of truth, and having put on the breastplate of righteousness, and, as shoes for your feet, having put on the readiness given by the gospel of peace. In all circumstances take up the shield of faith, with which you can extinguish all the flaming darts of the evil one; and take the helmet of salvation, and the sword of the Spirit, which is the word of God, praying at all times in the Spirit, with all prayer and supplication. To that end, keep alert with all perseverance, making supplication for all the saints,” Ephesians 6:14-18
Our job with the lost is preach the Good News as directed by the Holy Spirit knowing they cannot understand the word of God without the Spirit of God
“For those who live according to the flesh set their minds on the things of the flesh, but those who live according to the Spirit set their minds on the things of the Spirit. For to set the mind on the flesh is death, but to set the mind on the Spirit is life and peace. For the mind that is set on the flesh is hostile to God, for it does not submit to God’s law; indeed, it cannot. Those who are in the flesh cannot please God.” Romans 8:5-8
We are also called to love them, pray for them and return good for evil but also to be sensitive to what the Holy Spirit may be doing in their lives. The Holy Spirit may prompt you to use one of the nine Holy Spirit gifts that He expects us to operate in. He distributes them according to His will.
“Love your enemies, and do good, and lend, expecting nothing in return, and your reward will be great, and you will be sons of the Most High, for He is kind to the ungrateful and the evil. Be merciful, even as your Father is merciful.” Luke 6:35-36
“God also bore witness by signs and wonders and various miracles and by gifts of the Holy Spirit distributed according to His will.“ Hebrews 2:4