Bede

And David said to Saul: Your servant was tending, etc. The Lord strengthens the weak in faith, calls unbelievers to faith, urging modestly that amidst the frailties of His humanity, by which He took on our pains, even the exalted aspects of His Divinity, by which He is capable of healing those pains, may be recognized. He Himself, he says, now deformed in the habit of a servant, for the sake of your salvation, was feeding from eternity with heavenly aliments the hearts of all the faithful, namely the flock of My Father. …

Commentary on Samuel ↗