At its core is a deep yearning for a foundational, early act of divine kindness—one powerful enough to illuminate and bring joy to the entirety of human or national existence.
The primary approach among commentators views this plea through the lens of national redemption, where the break of day represents salvation. After enduring the dark, painful night of exile, this dawn brings the light of freedom [רש״י, רד״ק, מאירי]. The hope is that when this redemption arrives, it will usher in continuous, eternal joy, completely free from any future hardship [רד״ק, מאירי], offering ultimate comfort and compensation for all past suffering [רש״י]. Looking through a historical lens, this early light can also represent the very beginning of the nation's history, around the time of the Exodus from Egypt. By experiencing God's profound kindness at the start of their journey, the Israelites would gain the lasting hope and strength needed to endure future exiles. Alternatively, it is seen as a plea for a perfect, immediate redemption that bypasses the tragic intermediate destructions of the Temples [אלשיך].
Shifting from the national to the personal, another perspective interprets the early hours as the dawn of the human lifespan—childhood and youth [אבן עזרא, מלבי״ם, ביאור שטיינזלץ, מאירי]. Here, the prayer is an appeal for God to grant His kindness and guidance during our formative years [אבן עזרא, מאירי]. Experiencing happiness and a deep connection to God early in life builds a lasting spiritual resilience. This strong foundation keeps a person away from sin, ensures a lifetime of joy and dedication to Torah and Commandments, and provides a shield against life's unpredictable challenges even into old age [אבן עזרא, אלשיך, מלבי״ם, ביאור שטיינזלץ]. Furthermore, it reflects a desire to experience the light of the Divine Presence right now, in the early stages of life in this world, rather than waiting to receive spiritual reward only in the evening of life after passing away [אלשיך].
Finally, a more literal approach understands this dawn simply as the start of every new day, representing a prayer for constant, daily guidance and grace [מצודת דוד, מאירי]. When God grants His kindness each day, humanity responds with gratitude and joyful praise. This thankful response invites even more divine goodness, creating a beautiful, endless cycle of God's kindness and human joy that repeats continuously throughout our lives [מצודת דוד].