"Speak to the heart of Jerusalem," G-d says, "because her punishment is over. She has paid for her sins and then some!" A voice calls out that there is a clear path in the desert, by which the exiles may return. The mountains and valleys will be as if smoothed out in order to make travel easier. People are like grass which ultimately cut and dries up, but the word of G-d endures forever. Ascend to Jerusalem and call out to the nation "Behold your G-d!" G-d comes with a strong hand and He's bringing reward for the righteous with Him. G-d is like a shepherd, caring for His flock and carrying the lambs. He measured out the waters, the Heavens and the earth; He put His word in the mouths of the prophets. If He can do all that, He can surely keep this promise!
All the nations are like a single drop that falls from a bucket, like dust in the wind (that is, they are insignificant). All the forests of Lebanon are not enough for the fire on G-d's altar and all the animals are not enough for His sacrifices. All the nations combined are nothing compared to G-d.
What can be compared to G-d? Idols are the product of a workman's hand - worship the One Who made the world! G-d sits above the world and people are like insects before Him. He stretches out the Heavens like a canopy over us. He reduces the haughty to nothing, as if they were never planted or sown. They're like a tree whose trunk never took root; He can just blow them down. They're blown away like straw in a storm.
To whom will one compare G-d? He created the stars in the sky. He calls them by name and none of them are absent.