Interesting, who Paul is calling "without"? And what does he mean by calling to communicate with these "without" reasonably, using any possibility (that implies the Greek corresponding expression, which means exactly "to use time the best way")? Usually in the early Christian Church, were called "without" all those who did not belong to it. If that is the case, then it turns out that Paul recommends to treat reasonably these people, who have no relation with the Church. But in what sense he says it?
Obviously, people not belonging to the Church, could either sympathize with the Christians, by being interested in their life and doctrine, or be enemy with them, or remain indifferent. Naturally, with the enemies, fruitful contacts could hardly be possible, but with the two other categories - completely. And it is all the same perhaps about not only that the contacts with those that are without, with whom they maintain, would be just as effective from the point of view of the resolution of concrete problems and questions, that it came to solve with these people.
It was also probably about the fact that every communication with those that are without became a witness. Indeed, if man lives in the Kingdom, he cannot hide it. He may not witness in the sense that we understand this word today, he may even say nothing about the Christianity. But the problem in fact is not only in what is said, but also in how. Ultimately, the Kingdom consists of relationships, the relationships of its residents between themselves and each of them with Christ.
And the man living in the Kingdom and knowing how to build and maintain such relationships, cannot simply treat differently the man that is without, who, certainly, will not be able not to notice a certain, at least, of such unusual relation to him: because in the non transformed world nothing similar can happen. And in such case, even ordinary, for example, a business meeting still turns out to be a witness of the Kingdom. At least because it allows to see on the example of a concrete person, the alternative to the non transformed world and the non transformed order of things.
