* The realisation that the human embryo develops in stages was not discussed and illustrated until the 15th century. Leonardo da Vinci drew the first known illustration of a foetus in the uterus in the 15th century. After the microscope was discovered in the 17th century by a Dutch microscopist, Antonie van Leeuwenhoek, the early stages of chick embryo were described for the first time in history. The staging of human embryos was not described until the 20th century. Streeter (1941) developed the first system of staging of the human embryo, which has been now replaced by a more accurate system proposed by O Rahilly (1972). Therefore, the three veils of darkness may refer to: (1) the anterior abdominal wall; (2) the uterine wall; and (3) the amniochorionic membrane. According to another interpretation, the three veils of darkness may refer to: (1) chorion; (2) amnion; and (3) amniotic fluid. But the first interpretation is known to be the most logical from an embryological point of view. (See: Arey L. B. in Development of Anatomy: A Textbook and Laboratory Manual of Embryology; Moor, K. L. in The Developing Human Clinically Oriented Embryology; and O Rahilly in R. in Guide to the Staging of Human Embryo.)
* The difference between the two deaths is worth seeing. As the two slaves mentioned in verse 29 cannot be equal, similarly, it is said that the passing of the Holy Prophet (blessings and peace be upon him) and the death of others can never be alike; in reality, both are completely different. A slave owned by one master is safe and secure; in contrast, a slave shared by many masters is ruined. My Beloved Prophet! You are an exclusively chosen and highly esteemed servant of the Lord; you do not share your devotion and loyalty to Him with anyone else. In contrast, the disbelievers share their servitude, devotion and loyalty with many self-made gods. Therefore, death cannot subdue you, but it will make them fall prey to eternal damnation and extinction.
* One group will say to the other: ‘You stopped us from understanding the esteemed station of the Prophet and accepting his glorious message.’ Others will reply: ‘No, you were misguided yourselves.’