The great need in all lines of Christian work to-day is men and women whom the Holy Ghost calls and sends forth. We have plenty of men and women whom men have called and sent forth. We have plenty of men and women who have called themselves, for there are many to-day who object strenuously to being sent forth by men, by any organization of any kind, but, in fact, are what is immeasurably worse, sent forth by themselves and not by God. _How does the Holy Spirit call?_ The passage before us does not tell us how the Holy Spirit spoke to the group of prophets and teachers in Antioch, telling them to separate Barnabas and Saul to the work to which He had called them. It is presumably purposely silent on this point. Possibly it is silent on this point lest we should think that the Holy Spirit must always call in precisely the same way. There is nothing whatever to indicate that He spoke by an audible voice, much less is there anything to indicate that He made His will known in any of the fantastic ways in which some in these days profess to discern His leading—as for example, by twitchings of the body, by shuddering, by opening of the Bible at random and putting his finger on a passage that may be construed into some entirely different meaning than that which the inspired author intended by it. The important point is, He made His will clearly known, and He is willing to make His will clearly known to us to-day. Sometimes He makes it known in one way and sometimes in another, but He will make it known. But _how shall we receive the Holy Spirit’s call_? First of all, by desiring it; second, by earnestly seeking it; third, by waiting upon the Lord for it; fourth, by expecting it. The record reads, “As they _ministered to the Lord, and fasted_.” They were waiting upon the Lord for His direction. For the time being they had turned their back utterly upon worldly cares and enjoyments, even upon those things which were perfectly proper in their place. Many a man is saying to-day in justification for his staying home from the foreign field, “I have never had a call.” But how do you know that? Have you been listening for a call? God usually speaks in a still small voice and it is only the listening ear that can catch it. Have you ever definitely offered yourself to God to send you where He will? While no man or woman ought to go to China or Africa or other foreign field unless they are clearly and definitely called, they ought each to offer themselves to God for this work and be ready for the call and be listening sharply that they may hear the call if it comes. Let it be borne distinctly in mind that a man needs no more definite call to Africa than to Boston, or New York, or London, or any other desirable field at home.