Similarly, as all of the constellations pass through the sky, the ones in the front see the ones behind them. They are like a man descending a ladder who looks backwards. This teaches us that Hashem makes peace on high. Even the heavenly bodies have no hatred, jealousy, or competition. Never the less, they need peace.
Peace is a very great blessing.
There is no vessel other than peace that can hold a blessing. This teaches us that a blessing is nothing if it does not contain peace. Peace is very great. Rabbi Meir was once sitting and lecturing all Saturday night. A woman was listening to it and remained there until Rabbi Meir had finished.