The physician Luke likely helped Paul and others to deal with their maladies. But Luke made his greatest contribution as an evangelizer and a Bible writer.
لَيْسَ أَوَّلُ مَا يَتَبَادَرُ إِلَى ذِهْنِنَا عَنْهُ هُوَ أَنَّهُ قَائِدٌ عَسْكَرِيٌّ أَوْ مُوسِيقِيٌّ أَوْ مُؤَلِّفٌ ،‏ بَلْ أَنَّهُ ‹ رَجُلٌ يُوَافِقُ قَلْبَ › ٱللهِ .‏