Standing before King Saul, David seeks to prove his fitness to fight a giant Philistine warrior. Lacking formal military experience, he draws upon the harsh realities of his daily life, painting a picture of a man accustomed to life-and-death struggles against wild forces far stronger than himself.
David explains that tending his father's flock was his permanent, everyday occupation [ביאור שטיינזלץ]. Out of this quiet routine emerged extraordinary bravery, forged in the face of extreme danger. When savage predators threatened the flock, they presented a terrifying challenge. The primary approach among commentators is that a lion and a bear attacked the flock simultaneously, forcing David to confront both massive threats at the exact same time. Others, however, understand that these attacks happened on separate occasions, with a lion striking at one point and a bear at another [רש"י, רד"ק, ביאור שטיינזלץ].
The nature of the attack highlights the sheer intensity of the danger. A predator that has already snatched a lamb from the flock is at the absolute peak of its rage and physical power. Yet, instead of retreating, David chased the beast down, struck it, and rescued the lamb from its jaws. Enraged, the wild animal turned to attack him directly. He still did not flee; he grabbed the beast and killed it [אברבנאל].
By detailing this encounter, David aims to prove his tactical and physical superiority to Saul. He demonstrates his ability to fight enemies that possess both a numerical advantage, having faced two beasts at once, and a qualitative advantage, having fought the most ferocious animals in nature. Furthermore, he emphasizes that these encounters happened many times. His bravery is not a rare stroke of luck, but the deeply ingrained, stable trait of a skilled warrior. The logical conclusion is clear: if he can subdue mighty beasts of prey, he can certainly defeat a human enemy [אברבנאל].
Despite this compelling physical argument, Saul remained hesitant, struggling to believe that a shepherd could naturally overpower a seasoned giant. Recognizing that the king was not convinced by the tactical explanation, David shifted his approach and offered a profound spiritual argument. He declared that the very same God who had miraculously saved him from the teeth of the lion and the bear would also save him from the Philistine. It was only after hearing this second argument, rooted entirely in God's providence rather than human strength, that Saul was finally convinced and granted David permission to enter the battlefield [מלבי"ם, אברבנאל].