Pray on the Pendulum

At some points in our lives, we all feel like we are swinging on a pendulum. All of us are tempted to to remember with fondness the good old days. And all of us are prone to forget God's promises of love and faithfulness for tomorrow. Psalm 89, the final song of Book 3, exposes the posture of our hearts: we want it now, and as it is often noted, we are grace amnesiacs. Will we wait for the Lord, remembering his yesterday-goodness to trust in his tomorrow-grace?