7:13 Up, sanctify the people, and say, Sanctify yourselves against to morrow: for thus saith the LORD God of Israel, [There is] an accursed thing in the midst of thee, O Israel: thou canst not stand before thine enemies, until ye take away the {g} accursed thing from among you.
(g) Meaning, the man that took of the thing forbidden.
7:13 Sanctify yourselves - Purify yourselves from that defilement which you have all in some sort contracted by this accursed fact, and prepare yourselves to appear before the Lord, expecting the sentence of God for the discovery and punishment of the sin, and that the guilty person might hereby be awakened, and brought to a free confession of his fault. And it is a marvellous thing that Achan did not on this occasion acknowledge his crime; but this is to be imputed to the heart - hardening power of sin, which makes men, grow worse and worse; to his pride, being loath to take to himself the shame of such a mischievous and infamous action; and to his vain conceit, whereby he might think others were guilty as well as he, and some of them might be taken, and he escape.
7:10-15 God awakens Joshua to inquiry, by telling him that when this accursed thing was put away, all would be well. Times of danger and trouble should be times of reformation. We should look at home, into our own hearts, into our own houses, and make diligent search to find out if there be not some accursed thing there, which God sees and abhors; some secret lust, some unlawful gain, some undue withholding from God or from others. We cannot prosper, until the accursed thing be destroyed out of our hearts, and put out of our habitations and our families, and forsaken in our lives. When the sin of sinners finds them out, God is to be acknowledged. With a certain and unerring judgment, the righteous God does and will distinguish between the innocent and the guilty; so that though the righteous are of the same tribe, and family, and household with the wicked, yet they never shall be treated as the wicked.