We do not know how the stone was sealed. It was already so large a stone that the women knew they could not move it on their own, but now it was sealed also. So here is the power of man to ensure the Lord stays dead, versus the power of God to raise him from the dead. Is there any contest? As the Charles Wesley writes: ‘Vain the stone, the watch, the seal; Christ has burst the gates of hell; death in vain forbids his rise; Christ has opened paradise.’