Editor’s Note: the following is an excerpt from Sarah Ivill’s new book, Heart Matters: Teaching with Purity and Purpose, used by permission. The book of Deuteronomy mentions the heart often. Perhaps most striking is the truth that “to the LORD your God belong heaven and the heaven of heavens, the earth with all that is in it. Yet the LORD set his heart in love on . . . you” (Deut. 10:14-15). Ponder that for a moment. We are “a people holy to the LORD . . . his treasured possession” (Deut. 7:6). Such status is not because of anything good in us, but “because the LORD loves you” and is “the faithful God who keeps covenant and steadfast love with those who love him and keep his commandments” (Deut. 7:8-9). This status with God is an important truth for us to hold to not only for ourselves, but also to share with others. There will be times when we are tempted to fall into the performance trap. We may think we have to be perfect to be approved, by God or by others. We may be tempted to envy another’s capabilities or opportunities. We might compete with or compare ourselves to others. So, it does our hearts good to return often to the truth that the Lord set His love upon us, even when we were His enemies (Rom. 5:10; Eph. 2:4-5). Even if we do not measure up to our own expectations—and we seldom do—or even the expectations of others, the Lord is faithful to love us...