תהלים, פרק קל״ו, פסוק ז׳

The presence of light in the sky is one of the most fundamental building blocks of existence, ensuring the continuity of the world. By placing these celestial bodies above, the earth becomes visible, and human life, which relies entirely on this illumination, becomes possible [אבן עזרא, המאירי]. God's kindness is evident not just in their creation, but in their eternal and ceaseless operation [רד״ק].

This divine kindness is further reflected in the precise division of roles between the sun and the moon, serving as a marvel of providence. The sun brightens the day, allowing humanity to go out and work. In contrast, the moon illuminates the night, a time when people rest from their labor and the wild animals of the forest roam [מלבי״ם].

Although the moon was later diminished, both celestial bodies were initially created large. This original design was rooted purely in God's kindness toward the world. His intention was to provide abundant light even during the night, specifically to reduce the dangers and hazards that naturally lurk in the darkness [אלשיך].