The earlier part of this chapter shows that the people, by their representatives, responded with alacrity--which to Joshua seemed too eager--to his charge, and enumerated with too facile tongues God's deliverances and benefits. His ear must have caught some tones of levity, if not of insincerity, in the lightly-made vow. So he meets it with a douche of cold water in verses 19, 20, because he wishes to condense vaporous resolutions into something more tangible and permanent. Cold, judiciously applied, solidifies. Discouragements, rightly put, encourage. The best way to deepen and confirm good resolutions which have been too swiftly and inconsiderately formed, is to state very plainly all the difficulty of keeping them. The hand that seems to repel, often most powerfully attracts. There is no better way of turning a somewhat careless 'we will' into a persistent 'nay, but we _will_' than to interpose a 'ye cannot.' Many a boy has been made a sailor by the stories of hardships which his parents have meant as dissuasives. Joshua here is doing exactly what Jesus Christ often did. He refused glib vows because He desired whole hearts. His very longing that men should follow Him made Him send them back to bethink themselves when they promised to do it. 'Master, I will follow Thee whithersoever Thou goest!' was answered by no recognition of the speaker's enthusiasm, and by no word of pleasure or invitation, but by the apparently cold repulse: 'Foxes have holes, birds of the air roosting-places; but the Son of Man has not where to lay His head. That is what you are offering to share. Do you stand to your words?' So, when once 'great multitudes' came to Him He turned on them, with no invitation in His words, and told them the hard conditions of discipleship as being entire self-renunciation. He will have no soldiers enlisted under false pretences. They shall know the full difficulties and trials which they must meet; and if, knowing these, they still are willing to take His yoke upon them, then how exuberant and warm the welcome which He gives!
There is a real danger that this side of the evangelist's work should be overlooked in the earnestness with which the other side is done. We cannot be too emphatic in our reiteration of Christ's call to all the 'weary and heavy-laden' to come unto Him, nor too confident in our assurance that whosoever comes will not be 'cast out'; but we may be, and, I fear, often are, defective in our repetition of Christ's demand for entire surrender, and of His warning to intending disciples of what they are taking upon them. We shall repel no true seeker by duly emphasising the difficulties of the Christian course. Perhaps, if there were more plain speaking about these at the beginning, there would be fewer backsliders and dead professors with 'a name to live.' Christ ran the risk of the rich ruler's going away sorrowful, and so should His messengers do. The sorrow tells of real desire, and the departure will sooner or later be exchanged for return with a deeper and more thorough purpose, if the earlier wish had any substance in it. If it had not, better that the consciousness of its hollowness should be forced upon the man, than that he should outwardly become what he is not really,--a Christian; for, in the one case, he may be led to reflection which may issue in thorough surrender; and in the other he will be a self-deceived deceiver, and probably an apostate.
Note the special form of Joshua's warning. It turns mainly on two points,--the extent of the obligations which they were so lightly incurring, and the heavy penalties of their infraction. As to the former, the vow to 'serve the Lord' had been made, as he fears, with small consideration of what it meant. In heathenism, the 'service' of a god is a mere matter of outward acts of so-called worship. There is absolutely no connection between religion and morality in idolatrous systems. The notion that the service of a god implies any duties in common life beyond ceremonial ones is wholly foreign to paganism in all its forms. The establishment of the opposite idea is wholly the consequence of revelation. So we need not wonder if the pagan conception of service was here in the minds of the vowing assembly. If we look at their vow, as recorded in verses 16-18, we see nothing in it which necessarily implies a loftier idea. Jehovah is their national God, who has fought and conquered for them, therefore they will 'serve Him.' If we substitute Baal, or Chemosh, or Nebo, or Ra, for Jehovah, this is exactly what we read on Moabite stones and Assyrian tablets and Egyptian tombs. The reasons for the service, and the service itself, are both suspiciously external. We are not judging the people more harshly than Joshua did; for he clearly was not satisfied with them, and the tone of his answer sufficiently shows what he thought wrong in them. Observe that he does not call Jehovah 'your God.' He does so afterwards; but in this grave reply to their exuberant enthusiasm he speaks of Him only as 'the Lord,' as if he would put stress on the monotheistic conception, which, at all events, does not appear in the people's words, and was probably dim in their thoughts. Then observe that he broadly asserts the impossibility of their serving the Lord; that is, of course, so long as they continued in their then tone of feeling about Him and His service.