For we are not fighting against flesh-and-blood enemies, but against evil rulers and authorities of the unseen world, against mighty powers in this dark world, and against evil spirits in the heavenly places.
We tend to judge by appearance. If they look good on the outside they must be good on the inside. But the condition of someone's heart has nothing to do with how they dress and smell or even act. It has to do with who lives in them.
As a born again believer we have Holy Spirit living inside. He is one with our spirit. Jesus is in us and wants to work through us shining His light to all we come in contact with.
We all know someone who works at a dirty job. I mean they are covered in dirt or grease because of the job they have. Then we see them at church or at a restaurant somewhere and think "Gee, they clean up pretty well".
We must ask for more wisdom daily and for discernment to see beneath the surface. They may look good but be under control of the enemy. Let Holy Spirit guide you in every encounter so you can discern the truth.
Be prepared for battle with the enemy through those still under his control. Dress yourself for that battle by putting on the full armor of God. Let Holy Spirit guide your walk, your thoughts, and your words.