The fourth thing is related to people’s eyes—that is, light. This is very important. When you see a bright light, and the brightness of this light reaches a certain extent, your eyes will be blinded. After all, human eyes are eyes of flesh. They are not immune to damage. Does anyone dare to stare directly at the sun? (No.) Has anyone tried it? Some people have tried it. You are able to look with sunglasses on, right? That requires the assistance of tools. Without tools, man’s naked eyes do not dare to stare directly into the sun. Human beings do not have this ability. God created the sun to bring light to mankind, but He also manipulated this light. God did not simply leave the sun and ignore it after creating it. “Who cares if man’s eyes can withstand it!” God doesn’t do things like that. He does things very delicately and considers all aspects. God gave mankind eyes so they can see, but God has also prepared the range of brightness that they can see under. It won’t do if there is not enough light. If it is so dark that people cannot see their hand in front of them, then their eyes will lose their function and be of no use. People’s eyes will not be able to withstand places that are too bright, and they will also not be able to see anything. So in the environment mankind lives in, God has given them the amount of light appropriate to human eyes. This light will not hurt or damage people’s eyes. Moreover, it will not make people’s eyes lose their function, and can also guarantee that people’s eyes will be able to clearly see everything they should see. This is why God had added the appropriate amount of clouds around the sun and the earth, and the density of the air is also able to normally filter out the light that can hurt people’s eyes or skin. This is correlated. In addition, the color of the earth created by God also reflects sunlight and all kinds of light and gets rid of that part of the brightness in light that makes human eyes uncomfortable. That way, people don’t need to always wear very dark sunglasses to be able to walk around outside and carry out their lives. Under normal circumstances, human eyes can see things within the scope of their vision and will not be interfered with by light. That is, this light cannot be too piercing nor too dim: If it is too dim, people’s eyes will be damaged and they won’t be able to use them for very long before their eyes stop functioning; if it is too bright, people’s eyes won’t be able to withstand it, and their eyes will be unusable within 30 to 40 years or 40 to 50 years. That is to say, this light is suitable for human eyes to see, and the damage brought to human eyes by light has been minimized by God through various methods. Regardless of whether light brings benefits or drawbacks to human eyes, it is sufficient to allow people’s eyes to last until the end of their lives. Right? (Yes.) Hasn’t God thought it through very thoroughly? But when Satan, the devil, does things, it never considers any of these. It does not care at all whether something will bring harm to people. It has done a lot of things to damage the ecological environment, and people have now seen some of it. The light is either too bright or too dim—it does not consider mankind’s feelings at all.
God did these things to all aspects of the human body—vision, hearing, taste, breathing, feelings … to maximize mankind’s survival adaptability so that they can live—to live normally and continue to live. Such an existing living environment created by God is the living environment most suitable and beneficial to the survival of mankind. Some might think that this is not much and that it is all just very ordinary. Sounds, light, and air are things people feel they are born with, things they can enjoy from the moment of birth. But what God did behind their enjoyment of these things is something they need to know and understand. Regardless of whether you feel there is any need to understand or know these things, in short, when God created these things, He had expended thought, He had a plan, He had certain ideas. He did not put mankind in such a living environment simply, casually, or without any consideration. You may think that each one of these things I have spoken about is not a big deal, but in My view, each thing God supplied to mankind is necessary for the survival of humanity. There is God’s action in this.