with his sling in his hand, drew near to the Philistine. The giant strode boldly forward, expecting to meet the mightiest of the warriors of Israel. His armor-bearer walked before him, and he looked as if nothing could withstand him. As he came nearer to David he saw but a stripling, called a boy because of his youth. David's countenance was ruddy with health, and his well-knit form, unprotected by armor, was displayed to advantage; yet between its youthful outline and the massive proportions of the Philistine, there was a marked contrast. PP 646.4 Goliath was filled with amazement and anger. “Am I a dog,” he exclaimed, “that thou comest to me with staves?” Then he poured upon David the most terrible curses by all the gods of his knowledge. He cried in derision, “Come to me, and I will give thy flesh unto the fowls of the air, and to the beasts of the field.” PP 647.1 David did not weaken before the champion of the Philistines. Stepping forward, he said to his antagonist: “Thou comest …
"And when the Philistine looked about, and saw David, he disdained him: for he was but a youth, and ruddy, and of a fair countenance."
The EGW passage elaborates on the description of David in 1 Samuel 17:42, highlighting his youth and appearance in contrast to Goliath.