Sealing the stone - The sepulchre was made sure by affixing the large stone to the entrance in such a way that it could not be removed without detection. It was sealed. In what way this was done cannot now be certainly told. The cave in which Daniel was cast was fastened in the same manner, and sealed with the king’s signet Daniel 6:17, perhaps by fastening the stone in its place with cords, and bringing them together and uniting them with wax, and impressing on that the seal of the king. In this way, letters and books were anciently sealed. Possibly on the sepulchre of Jesus was impressed in this manner the seal of Pilate - the seal of office - making it doubly sure; or it may be that the stone was fitted into the tomb with clay or cement, and on that was impressed the seal of Pilate.
Setting a watch - That is, as large a number of soldiers as they judged necessary to secure the tomb.
We cannot but be struck with the wisdom of God in ordering the circumstances of the Saviour’s burial in such a manner as to avoid the possibility of deception. Had all this been done by his “friends,” it might have been said that they only pretended to secure the tomb, and only pretended that he was dead. But he was adjudged to be dead “by the Jews themselves;” Pilate was satisfied that that was the fact; they had their own way about his burial; he was buried alone; the place of his sepulchre was made sure, “expressly to prevent his being removed;” and they placed around him a guard, in their own judgment large enough to prevent his being taken away by force or strength. His very enemies, therefore, took every possible precaution to place his resurrection beyond the possibility of suspicion of fraud and imposture, and those precautions were the very means of furnishing the most striking proof that his death, burial, and resurrection were not impositions, but most affecting, awful, and yet cheering realities.