St. Gregory of Tours spoke about the twin brothers in this way: “These two physicians cured as many people by their prayers as they did by their medical knowledge, and now in heaven they still care for the sick miraculously.”    

Saints Cosmas and Damian, you were touched by Christ and sought to share your faith in Him through your selfless and free service to all who needed your medical care. When persecuted, you remained strong in your faith, preferring death over sin. Please pray for me, that I will follow your example of selfless service to others and will have the courage to be a witness to Christ no matter the cost. (My Catholic Life)