Imagine that you have to go somewhere at night on a road that has no lights on it. You will need to take a source of light with you and there are two available. One is a flashlight and the other is an oil lamp. The flashlight has fresh batteries and you can see a long distance by its light. The lamp only gives off enough light to illuminate the area immediately around you. Which one would you choose?
This question is a no-brainer. With the flashlight you could see a long way ahead and know what to expect as you travel. You wouldn’t be surprised by unexpected obstacles. When you use a lamp only the area immediately around is illuminated and you have no idea what lies further ahead. If there are obstacles you won’t know about them until you reach them.