[Pooya/Ali Commentary 102:5] Refer to the commentary of Haqqah: 38 to 52 for the three kinds of yaqin (certainty of knowledge). The denier of the day of requital, who does not use reasoning faculties in this life to follow the right path, shall yet see (and meet) the punishment for his sins. It will be certainty of sight. He shall see hell with his own eyes when he will be thrown into the abyss. See Maryam: 71 and 72.