In Genesis, God walked in the garden with his creation, mankind. This intimacy and fellowship between Spirit and flesh were ruptured by sin and the fall. No more walks, no more intimacy as man went his own way. The gardeners forsook their duties.
All that changed, when God came to earth as a man. The God who once walked and talked with man in intimate union, now walked and talked as man in hypostatic union. He came to live, to die, to rise, to ascend. He came that, through his sacrifice, the Holy Spirit could be given to indwell his people, calling us back to the garden.
First man and woman tended the garden. New men and women restore the garden. God once again walks, not only among us, but within us.