In her autobiography, My Life, former Israeli prime minister Golda Meir tells the story of her devout Jewish grandfather who lived in Russia. He was required to serve in the Russian army for sixteen years. During that time he tried to keep every Jewish law and custom even though it meant that he faced intense persecution—even being forced to kneel on a stone floor for hours.
When he was released, he feared that he may have somehow broken the Law and for the rest of his lilfe he slept on a stone floor using a stone for his pillow to try to makeup for any sin he may have accidentally committed.
It is tragic that he went to such lengths to pay for his sin when Jesus has provided the atonement.