The greater the mass of the object, the greater the speed and the slower the relative time. No matter how fast people speed themselves up, their subjective time and conscious life span are limited. The Old Testament says that "the vast majority will not last more than one hundred and twenty years". Caesar stands for conscious human beings, and the robot on the left stands for artificial intelligence without subjective consciousness, because the speed of light is constant, the golden light in the middle symbolizes eternity. Just as Caesar was murdered by accident, the existence of subjective consciousness may disappear at any time. People enjoy the wine of time in the Holy Grail, while simultaneously facing the muzzle of doom in the light. When consciousness does not exist, time does not exist. The carrier of consciousness disappears, all things belong to one, the last observer disappears, and all things cease to exist.