Paul's mission in Corinth

In 2 Corinthians, 6:14, we read: "Do not be unequally yoked together with unbelievers. For what fellowship has righteousness with lawlessness? And what communion has light with darkness?" Paul's words puzzled me.

He had good reason to be concerned about the mission he himself founded in Corinth. His letter, and this Scripture seem to implore his brethren to remain pure in their faith, steadfast in focus. Yet, this passage, read too quickly, could seem to mean Paul suggesting there's no merit in associating at all with unbelievers. But, maybe there is a key word that reveals Paul's intention, more pragmatic in depth.

The enigma is clear, but it's also the church's challenge. You cannot witness to unbelievers from a distance. You must associate to influence, or the mission becomes futile, no souls won. Paul wrote, "do not be UNEQUALLY yoked together with unbelievers." He explains in Corinthians how he's late in returning to them, and why. This was Paul's second visit, first trip didn't go well and he hastened his exit. 

Harshly challenged by a wealthy and influential unbeliever, Paul wasn't certain how his church would respond, or who they would support upon his return. His letter is painfully written, the uncertainty is sorely evident in his words. But, Paul's concern was resolved as the people sided with him, rebuked the challenger, and faith in this early church was strengthened with Paul's request that mercy and forgiveness now prevail. They must somehow find equality with Paul's detractor, and join in his redemption. 

I'm grateful that my friends of faith somehow tolerate my different views, my doubts and questioning, and remain friends although we may disagree on the nature of God, man, and eternity.