Joshua was very emphatic in forbidding intermarriage and friendly social intercourse with Canaanites. He saw much need for the prayer, "Lead us not into temptation." He understood the meaning of enchanted ground. He knew that between the realm of holiness and the realm of sin there is a kind of neutral territory, which belongs strictly to neither, but which slopes towards the realm of sin, and in point of fact most commonly furnishes recruits not a few to the army of evil. Alas, how true is this still! Marriages between believers and unbelievers; friendly social fellowship, on equal terms, between the Church and the world; partnership in business between the godly and the ungodly--who does not know the usual result? In a few solitary cases, it may be, the child of the world is brought into the kingdom; but in how many instances do we find the buds of Christian promise nipped, and lukewarmness and backsliding, if not apostasy, coming in their room! There is no better help for the Christian life, no greater encouragement to fellowship with God, than congenial fellowship with other Christians, especially in the home, as there is no greater hindrance to these things than an alien spirit there. And if men and women would remember that of all that concerns them in this life their relation to God is infinitely the most momentous, and that whatever brings that relation into peril is the evil of all others most to be dreaded, we should not find them so ready for entangling connections which may be a gain for the things of this world, but for the things of eternity are commonly a grievous loss.
It is a very vivid picture that Joshua draws of the effects of that sinful compromise with their Canaanite neighbours against which he had warned them. "If ye do in any wise go back, and cleave unto the remnant of these nations, even these that remain among you, and shall make marriages with them, and go in unto them, and they to you: know for a certainty that the Lord your God will no more drive out any of these nations from before you; but they shall be snares and traps unto you, and scourges in your sides, and thorns in your eyes, until ye perish from off this good land which the Lord your God hath given you."
The Garden of Eden was not the only paradise that sin ruined. Here was something like a new paradise for the children of Israel; and yet there was a possibility--more than a possibility--of its being ruined by sin. The history of the future showed that Joshua was right. The Canaanites remaining in the land were scourges and thorns to the people of Israel, and the compliance of Israel with their idolatrous ways led first to invasion and oppression, then to captivity and exile, and finally to dispersion over the face of the earth. However sin may deceive at the beginning, in the end it always proves true to its real character--"the wages of sin is death." The trouble is that men will not believe what they do not like to believe. Sin has many a pleasure; and as long as the pleasure is not gross, but wears an air of refinement, there seems no harm in it, and it is freely enjoyed. But, unseen, it works like dry-rot, pulverising the soul, destroying all traces of spiritual relish or enjoyment of Divine things, and attaching the heart more strongly to mere material good. And sometimes when death comes in sight and it is felt that God has to be reckoned with, and the effort is honestly made to prepare for that solemn meeting by looking to the Divine Redeemer, the bent of the heart is found to be entirely the other way. Faith and repentance will not come; turning Godwards is an uncongenial, an impossible attitude; the heart has its roots too much in the world to be thus withdrawn from it. They allowed themselves to be drawn away from their early hope by the influence of worldly fellowship, to find that it profits a man nothing to gain the whole world if he lose his own soul.