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18 Seeing he despised the oath by breaking the covenant, when lo, he had given his hand, and hath done all these things, he shall not escape.
Walking represents living, and usually means living according to the true things taught to us by the Lord -- to "walk in His ways." When the Lord is pictured walking, it means life itself.
13 He declared to you his covenant, which he commanded you to perform, even the ten commandments; and he wrote them on two tables of stone.