We cannot help meeting many unconverted people as long as we live. We cannot avoid having intercourse with them, and doing business with them, unless "we go out of the world." (1 Cor. v. 10.) To treat them with the utmost courtesy, kindness, and charity, whenever we do meet them, is a positive duty. But acquaintance is one thing, and intimate friendship is quite another. To seek their society without cause, to choose their company, to cultivate intimacy with them, is very dangerous to the soul. Human nature is so constituted that we cannot be much with other people without effect on our own character. The old proverb will never fail to prove true: "Tell me with whom a man chooses to live, and I will tell you what he is." The Scripture says expressly, "He that walketh with wise men shall be wise; but a companion of fools shall be destroyed." (Prov. xiii. 20.) If then a Christian, who desires to live consistently, chooses for his friends those who either do not care for their souls, or the Bible, or God, or Christ, or holiness, or regard them as of secondary importance, it seems to me impossible for him to prosper in his religion. He will soon find that their ways are not his ways, nor their thoughts his thoughts, nor their tastes his tastes; and that, unless they change, he must give up intimacy with them. In short, there must be separation. Of course such separation will be painful. But if we have to choose between the loss of a friend and the injury of our souls, there ought to be no doubt in our minds. If friends will not walk in the narrow way with us, we must not walk in the broad way to please them. But let us distinctly understand that to attempt to keep up close intimacy between a converted and an unconverted person, if both are consistent with their natures, is to attempt an impossibility.