It is narrated from Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) drew lines and made a square shape. In the middle of this shape, he drew a line, and then inside the shape itself, he drew several more lines alongside it, and one line he drew outside the square. Then he said: "Do you know what this is?" They said: "Allah and His Messenger know best." The Prophet (peace and blessings be upon him) said: "The line in the middle is man, the lines alongside it are diseases that try to attack him at every place; if one misses its mark, another strikes. The lines forming the square are man's death, which surrounds him, and the line outside the shape is man's hope."