"At the time of his conversion, Paul was inspired with a longing desire to help his fellow men to behold Jesus of Nazareth as the Son of the living God, mighty to transform and to save. Henceforth his life was wholly devoted to an effort to portray the love and power of the Crucified One. His great heart of sympathy took in all classes. “I am debtor,” he declared, “both to the Greeks, and to the barbarians; both to the wise, and to the unwise.” Romans 1:14 . Love for the Lord of glory, whom he had so relentlessly persecuted in the person of His saints, was the actuating principle of his conduct, his motive power. If ever his ardor in the path of duty flagged, one glance at the cross and the amazing love there revealed, was enough to cause him to gird up the loins of his mind and press forward in the path of self-denial. AA 246.1"
"I am debtor both to the Greeks, and to the Barbarians; both to the wise, and to the unwise."
EGW directly quotes Romans 1:14.