Richard Wurmbrand, Romanian Jewish Christian, was caught and imprisoned by the communists for many years. After his release, he wrote several books about what he had learned while in great suffering in captivity. Later he founded Voice of the Martyrs.
And indeed you already are [extending and displaying your love] to all the brethren throughout Macedonia. But we beseech and earnestly exhort you, brethren, that you excel [in this matter] more and more, - 1 Thessalonians