Walk in wisdom,.... Or wisely, circumspectly, not as fools, but as wise men; See Gill on "Eph 5:15".Towards them that are without; so the Jews used to call the Gentiles, all that were out of their own land, that were not of their nation or religion, who were aliens from them, and strangers to their privileges; and sometimes the unbelieving.
Jews bear the same character, see Mr 4:11. Here it may design such who were not members of this church; so the distinction of those that are without, and such as are within, is used by the apostle in 1Co 5:12.
A church is an house or family, and such as belong to it are called the household of faith, and those that do not are they that are, without; it is as a city, and, those that are of it are fellow citizens with the saints, but others are strangers and foreigners; it is a garden enclosed, they that are planted in it are those that are within, and such as lie in the wide open field of the world are those that are without: but inasmuch as there are some who are not members of churches, and yet have the grace of God, this phrase may chiefly regard all unregenerate men, profane sinners, such as have not faith in Christ, nor hope in God, who are entirely destitute of the grace of God.
Now it becomes saints to walk wisely towards them; all communication with them is not cut off, or correspondence and conversation with them forbidden; the saints indeed are not to have their conversation among them as in times past; they are to have no fellowship with them in immoral actions, and superstitious practices; but they may be concerned with them in things civil, with respect to trade and commerce, and the common business of life; on these accounts they may keep company with them; otherwise, as the apostle elsewhere says, they must needs go out of the world.
But then it is incumbent upon them to behave wisely towards them, with the simplicity of the dove to join the wisdom of the serpent; they should walk inoffensively towards them, and do nothing to provoke them, to injure and persecute them, but take all prudent methods to gain their affections, escape their resentment and wrath, and obtain their liberty of worshipping God without disturbance; they should give to all their due, tribute, custom, fear, and honour, to whom they are due, and owe no man anything but love; they should submit to every ordinance of men and be subject to the higher powers, not only to escape wrath, but for conscience sake, and should give to Caesar the things that are Caesar's; they should pray for kings, and all in authority; for the prosperity of the nation, city, and place where they are, for their carnal relations and neighbours, and even their very entities, and do them all the good, both for soul and body, that lies in their power, and as they have opportunity; and by so doing, they will heap up coals of fire on their heads.