It flows directly from the gift that we have received. There are plenty of truths which, per se, carry with them no obligation to impart them. But any truth in which is wrapped up the possible happiness of another man, any truth which bears upon moral or spiritual subjects, carries with it the strongest obligation to impart it. We have such large insights into God and His love as the Gospel gives us, not that we may eat our morsel alone, or merely sun ourselves in the light, and expatiate in the warmth of the beams that come to us, but that we may share them with all around: 'God, who commanded the light to shine out of darkness hath shined into our hearts,' that we may 'give the light of the knowledge of the glory of God in the face of Jesus Christ.'

The obligation arises from the links that knit us all together. 'Am I my brother's keeper?' Why, the question answers itself. If he is your 'brother,' you are certainly his 'keeper.' And you cannot shuffle off the obligation by any irrelevant pitting of one field of Christian work against another; still less by any criticism, hostile or friendly, as it may be, of the methods of Christian work, or of the parity and elevation of the character and motives of the workers. Humanity is one, linked by a mystic chain, and every link of it should thrill by a common impulse; and through all the members there should circulate a common life. That great thought is one of the gains that the Gospel has brought us, and in the presence of it and our indebtedness and obligation to every man, woman, and child that bears the form of man, all geographical limits to Christian witnessing seem supremely absurd and incongruous. You cannot get rid of your obligation by saying, 'I do not care about foreign missions, I go in for home ones.' And you cannot get rid of it by chiming in an ignorant second to the talk that has been going on lately, carping at or criticising methods of work. It would be a very strange thing if we had hit all at once, in the very beginning of an enterprise, upon the best of all possible methods; and it would be a very strange thing if the mission-field is the only one where there are no lazy workers and selfish motives and unworthy occupants of high places. All that is true about home as it is about other places. But grant it all, and back comes the obligation based upon the nature of the truth that we have received, upon our links with our brethren, and upon our loyalty to our Master, and it peals into the ears of every Christian man and woman: 'Thou art a witness of these things'; and 'to this end wert thou born again, that thou mightest bear witness to the truth.'

Ah, brethren! the issues of faithfulness to that high function are sweet and blessed and wonderful. A witnessing Christian will be a believing Christian; for there is no surer way to deepen my own convictions about any moral or spiritual truth than to constitute myself their humble servant to proclaim them. Whosoever is a believer should be an apostle, and if he is an apostle he will be tenfold a believer. There is nothing which will give a man a firmer grasp of the Gospel for his own soul than when he finds that, ministered by his humble efforts, it produces in other hearts the same effects which he finds it working upon himself. There is no page in the great book of the evidences of the truth of Christianity more conclusive than that which in the last century has been written by the experience of Christian missions. Let the objectors, Jannes and Jambres, who withstood Moses, let them do the same with their enchantments, and then we will discuss the questions of the truth of the Gospel with them.

Nor need I do more than remind you of the highest of all blessed issues which is yet to come. 'Be thou faithful unto death and I will give thee a crown of life.' Alas! alas! how many of us professing Christians will have to stand at last without that 'crown of rejoicing' which they wear who, by their poor work and witness, have won some souls to the Master. Do you, Christian men, contemplate entering heaven alone, or bringing your sheaves with you? It will be sad to stand with hands empty then, because they were idle in the days of the seed-basket and the reaping-hook, whilst those that sowed and those that reaped shall rejoice together. 'Ye are the witnesses of these things': see to it that you do your work.

II. And now, secondly, and briefly, note the equipment of the witnesses for their task.

Our Lord here distinguishes two stages in the endowment. Then and there they receive the gift of the Divine Spirit, as is more fully recorded in John's account of these last days, but that gift, rich and precious as it was, was not yet the full bestowment which they needed for their task. That came on the day of Pentecost. Mark the vivid and picturesque word which our Lord here employs: 'Until ye be clothed with power from on high.' That divine gift coming down as a vesture, wraps and covers and hides their own weakness, their own naked and poor personality.

I can only say a word or two about this matter. The same collocation of ideas—a witnessing Spirit by whose indwelling energy the Christian community becomes witnesses, is found (and has been explained at length by me in former discourses) in the farewell words of our Lord in the upper chamber. 'The Spirit of Truth which proceedeth from the Father, He shall bear witness of Me, and ye also shall bear witness because ye have been with Me from the beginning.'

I need only remark here that the only power by which Christians can discharge their work of witnessing in the world is the power which clothes them from above. The new life which Jesus Christ brings and gives to us is the only life which will avail for discharging this office. Our self-will, the old life of nature, with all its dependence upon ourselves, is nought in reference to this task. But when that divine spark enters into men's hearts, then natural endowments are heightened into supernatural gifts, and new forces are developed, and new powers are bestowed and the earthen vessel is filled with new treasure. Without it—and there is a great deal of so-called Christian witnessing to-day without it—noise, advertising, skill in getting up externals, and all the other unworthy methods which Christian churches sometimes stoop to adopt, are powerless, as they ought to be. You may accomplish a great deal by fussy activity which calls itself Christian earnestness, and has not God's Spirit in it. But it is no more growth than are what the children call 'devil's puff-balls' which they find in the fields in these autumn mornings; and it will go up in poisonous, brown dust like these when it is pricked.

The one condition of Christian churches doing their Christian work is that they shall be clothed and filled with God's Spirit. Do not let us rely on machinery; do not let us rely on externals; do not let us rely on advertising tricks which might do very well for a cheap shop, but are all out of harmony with the work that we have to do; but let us rely on this, and on this alone. Holding converse with God and Christ, we shall come out of the secret place of the Most High with our faces glowing with the communion, and our lips on fire to proclaim the sweetnesses that lie within the shrine.

One word more and I have done. This clothing with the Spirit, which is the only fitness of the Church for its witnessing work, is only to be won by much solitary waiting. 'Tarry ye,' or as in the original it stands even more vividly, 'Sit ye still in the city … till ye be clothed.' It is because so many Christian workers are so seldom alone with Christ that so much of their work is nought, and comes to nought. To draw apart from outward activity into the solitary place, and sit with Him, is the only means by which we can keep up the freshness of our own spirits, and be fit for His service. Mary was being trained for Martha's work when she sat at Christ's feet; but Martha could not do hers without being 'troubled and careful,' because she was more accustomed to the work than to the communion that would have made it light.