For years I thought of the Sermon on the Mount (Matt. 5–7) as a blueprint for human behavior, a standard no one could possibly meet. How could I have missed the true meaning? Jesus spoke these words not to encumber us, but to tell us what God is like.
Why should we love our enemies? Because our merciful Father causes His sun to rise on the evil and the good. Why store up treasures in heaven? Because the Father lives there and will lavishly reward us. Why live without fear and worry? Because the same God who clothes the lilies and the grass of the field has promised to take care of us. Why pray? If an earthly father gives his son bread or fish, how much more will the Father in heaven give good gifts to those who ask?
Jesus gave the Sermon on the Mount (Matt. 5–7) not only to explain God’s ideal toward which we should never stop striving but also to show that in this life none of us will ever reach that ideal.
Before God, we all stand on level ground: murderers and tantrum-throwers, adulterers and lusters, thieves and coveters. We are all desperate, and that is the only state appropriate to a human being who wants to know God. Having fallen from the absolute ideal, we have nowhere to land but in the safety net of absolute grace.
Source: Our Daily Bread