Read this excerpt from Day by Day with the Persecuted Church, compiled by Jan Pit, at One Place.
"...a Chinese brother speaks from experience - 22 long years of imprisonment, torture, and hard labor - we should listen carefully. When asked what sustained him in prison he replied: Psalm 27 and the song "The Old Rugged Cross." "Let us cherish it and cling to it." Today and every day."
The LORD is my light and my salvation; Whom shall I fear? The LORD is the defense of my life; Whom shall I dread?
For in the day of trouble He will conceal me in His tabernacle; In the secret place of His tent He will hide me; He will lift me up on a rock.