God walketh. So making the camp holy ground. The ark was in the camp as a token of Jehovah’s presence (see Numbers 10:33-36). The form of the verb “to walk” here used suggests walking up and down in the camp (see Genesis 3:8; 13:17; 2 Samuel 7:6, 7). Compare the statement of the apostle Paul in 2 Corinthians 6:16 to 7:1, who may have had this verse in mind at the time he wrote.
No unclean thing. Literally, “any nakedness of anything,” commonly meaning indecent exposure. The same word occurs in Genesis 9:22, 23; Exodus 28:42; Leviticus 18:6, 7; etc.
Turn away. Compare Jeremiah 32:40. Nothing shameful, unclean, indecent, should be allowed to go unchecked, or God would not remain in the camp — meaning that He would allow them to be defeated by their enemies. An unclean church cannot be victorious in the controversy between Christ and Satan, for Heaven’s blessing awaits only those who trust and obey Him without reserve.