In English
Investigation of the heart is the real proof
Any enquiry made with machines is subject to errors just like the machine itself. It is the investigation of the heart that will vouch as real proof. These four methods of obtaining proof is very important because all religions attach great importance to justice. It was said of the Prophet, that when his son committed a sin, he was awarded the 100 strokes by whip prescribed by the religion for that particular mistake. When he died after 50 strokes, the Prophet ordered that the remaining 50 be carried out on his son's grave!