In reading this saying, there are a number of things to keep in mind.  First, the Greek word translated below as “attend” has a variety of important meanings: “to turn one’s mind or attention,” or “be intent upon,” “attend,”  “be attentive to,”  “devote one’s self to,” and “cling, or cleave to something.”  Isaiah instructs us first to attend to our selves, to devote or cling to our selves.  This is not selfish, but rather it directs us to the importance of the self in the image of God, the self as the first site for experiencing God, and so it demands our attention, our full devotion, because God is there present in the self.  Second, Isaiah tells us to dwell in our hearts.  The heart in Greek is the center of the self, the place of purpose and intention, the place where the mind, body, and soul meet in unison.  The heart is the life-force of the self.  Isaiah tells us to cling to the heart, to possess it, to occupy it, as the Greek verb might be translated.  Finally, Isaiah talks about sin, repentance, and renewal.  Here, Isaiah recognizes that often we stray from the place of the heart, from our center focused on God, and that we must turn again our attention to God who lives in the heart, at the core of human living.  In repenting, in turning again to God, we find that we have been “born again” and that being born again (or “born from above,” as John’s gospel would have it), all things have been made new.  Our return to the memory of the in-dwelling God remakes our selves and remakes the world. We can start again, and again, and again, because God is there at the center, if we attend to our selves.