Praise the LORD in song, for He has done excellent things;
Let this be known throughout the earth.
Cry aloud and shout for joy, O inhabitant of Zion,
For great in your midst is the Holy One of Israel.
There is great joy, excitement, and delight in the Christian life!
Do you sense the enthusiasm in Isaiah's heart as he writes these verses? Think of the things that God has done—this beautiful world, His creativity in the sunrise and sunset every day, the wonder of this vast universe and the beauty of the night sky, the way He has set up this amazing earth for us, the miracle of conception and birth. Truly, what God has done is "excellent".
But Isaiah is thinking more about what God has done for his readers and hearers. Think of what God has done for you. He has cared for you and brought you through all of life's difficult experiences. He reached out to you and began to reveal Himself to you. And the most excellent thing of all—Jesus suffered and died for you. "Let this be known throughout the earth"!
And the ultimate cry of joy for Isaiah comes from his awareness of God Himself. "Great in your midst is the Holy One of Israel." Take a few moments and meditate (think) about the greatness of God. That God is "in your midst". Respond to Him.