Whom do we consider as "unbelievers"?
Those are the people who do not or perhaps have not yet accepted Jesus Christ as their Lord and Savior. They often referred to as the "lost". In my profession as a teacher, I met a lot of them, mostly are my students, and some of my colleagues. But sometimes I am wondering or better yet surprise to observe that these "lost" ones are the one who behaves well. I mean, their actions are more convincing than those who presume and assume themselves as one ("Christ believer"). I am not judging them but it just saddened me that those who supposedly influenced others are the ones being influenced. Those whom I thought could share the great love of Christ are somehow being brainwashed by the people surrounding them.
In my class, I always ask somebody to pray before we start. I can tell who are those supposedly "have known the truth" through the way they pray but I am caught alarmed when I heard them cursing in the middle of the class just because somebody disturbed them while working on their drawing project.
Why it saddened me? It saddened me because I can sometimes see myself in them. I claimed to have been saved by grace and accepted Jesus as my Lord and Savior, yet judging the way I behave sometimes, I might be put into question when I will be facing God during the Judgment Day.
Indeed, in the book of Corinthians, Paul was right, "we should not be yoked together with unbelievers". There's a big possibility that we will really fall especially if our spiritual health is undernourished. And if we insist, we might get overwhelmed in the darkness that we will be like chasing in the dark because we cannot contain their presence around us.