Passage
But David was the youngest. Now the three oldest had gone after Saul,
But David was the youngest. Now the three oldest had gone after Saul,
1 Samuel 17:12 Now David was the son of the Ephrathite of Bethlehem in Judah, whose name was Jesse, and he had eight sons. And Jesse was old in the days of Saul, advanced in years among men.
1 Samuel 17:13 And the three older sons of Jesse had gone. They had gone after Saul to the battle. And the names of his three sons who went to the battle were Eliab the firstborn, and the second to him Abinadab, and the third Shammah.
1 Samuel 17:14 But David was the youngest. Now the three oldest had gone after Saul,
1 Samuel 17:15 but David went back and forth from Saul to shepherd his father’s flock at Bethlehem.
1 Samuel 17:16 Then the Philistine approached, morning and evening, for forty days and took his stand.
The verse centers on "david", "youngest", "three", "oldest", "gone", "after", and "saul". It is saying that the verse draws attention to "david" and "youngest", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 13's "And the three older sons of Jesse..." into verse 15's "but David went back and forth from...", so "david" and "youngest" belong inside that flow. In 1 Samuel context, the local focus is covenant, worship, and faithfulness.
A plain takeaway is to answer the verse's own emphasis on "david" and "youngest" with trust shaped by these words, not by a vague optimism outside the passage.