Later in the parashah, God begins to warn the people of the consequences if they choose not to walk in God's ways. However, the phrasing used, which Everett Fox translates as "if you walk with me in opposition, then I will walk with you in opposition," is curious. Furthermore, this warning is found three times in the parashah God is abandoning one another, for they are. And each time God accuses the people of walking "in opposition with" God the threatened punishments will bebecomes more severe. In spite of these threats and accusations however, the neither the people nor God is abandoning the other. For they are still portrayed as walking with one another, even if in opposition.
When we choose not to walk in God's ways, then God is simply walking next to us. It is almost as if God becomes a shadow, or even an adversary, but one that is prepared at any moment to become our support and comfort, if we so choose. It is our actions, our opposition, which prevents God from being within us. And it is our actions that will allow God to be within us once again. As the great Hassidic rebbe Menahem Mendel of Kotzk said, "God dwells where we let God in." In the context of this verse, it seems that God is simply walking along side us, waiting for each of us to let God in.
For each person "letting God in," means something different. To some it has a more anthropomorphic sense; to others it is more mystical. To others, such as myself, it can mean allowing the Power that brings peace and goodness into the world to flow through us.