The eternal covenant between God and His people is deeply connected to the fixed laws of nature. Just as the systems of the heavens and the earth operate in a perfect and unchanging order, the existence and destiny of the Israelites are guaranteed to endure forever. God exercises absolute control over creation. He provides the sun to give light during the day, and He sets the permanent laws of the moon and stars to illuminate the night [מצודת דוד, ביאור שטיינזלץ]. These laws represent a fixed permanence [מצודת ציון], governing the movement of the stars and planets with a deep wisdom that surpasses human understanding [רד״ק].
The primary approach among commentators is that these laws of nature serve to illustrate the eternal nature of the Israelites. Just as the natural order remains constant, the people will never change after returning from exile, and they will continue to serve God forever [רד״ק]. Looking toward the ultimate future, the desire of the Israelites to do good will become as natural and certain as a physical law of the universe, removing any possibility of them doing evil [מלבי״ם].
God's absolute power is further demonstrated through His command over the sea and its roaring waves, an action understood in several ways. One perspective is that God actively stirs and storms the waters, causing the waves to boil and crash loudly [רש״י, ביאור שטיינזלץ]. Another view understands this as an act of splitting or tearing, pointing back to the historical parting of the Red Sea. In this light, even as the waves roared with great force, God altered their very nature and split the waters so the Israelites could safely cross [מצודת דוד, מצודת ציון, רד״ק]. A third approach suggests that God calms the raging sea and brings quiet to its turbulent waves [מלבי ם באור המילות]. Ultimately, God is recognized as the Lord of Hosts. This title emphasizes His role as the supreme ruler over all forces in the heavens and on earth, holding absolute and final power over everything He has created [רד״ק].