Augustine of Hippo
He purposefully delayed for a reason. Let us understand what this delay signifies. The situation was dire, and the anger of God fell upon them (Psalm 77:30). Observe the reason for this delay. Initially, there was a fire ignited in Jacob, and divine displeasure was directed at Israel. Thus, He postponed action to first accomplish what they believed was impossible and subsequently to deliver to them what they rightly deserved. Had they placed their trust in God, not only would their earthly aspirations have been met, but their spiritual yearnings would also have found fulfillment.
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The one who opened the heavens and generously provided manna to sustain the unbelievers certainly has the authority to bestow upon believers the true Bread from Heaven, which that manna represented—a sustenance of angels, incorruptibly nourished by the Word of God. For humankind to partake of this sustenance, He took on flesh and lived among us (Jn. 1:44). The Bread Himself is offered throughout the world, as the divine message is proclaimed, not to the fault-finding assembly, but to the faithful Church that places its trust in Him. He can also strengthen the feeble faith of those who, though untested, believe, through the signs found in the spoken word, carried like birds through the air—not the kind from the northern regions, where chill and mist reign, but rather the South Wind from Heaven, guiding the earthward. This enables those with fragile faith, who are attuned to worldly matters, to receive the nourishment required for grasping the heavenly gifts.