Why is this the answer?

The answer is sleep because this clever riddle describes exactly what happens to our bodies every time we go to bed. It uses wonderful, imaginative words to trick your brain into thinking of the most common thing we all do. Let's look closely at the first clue, "I weaken all men for hours each day." This does not mean sleep is bad for you, but that it makes you weak in a gentle way. Think about when you are sleeping. You can't run a race or play a game. For several hours each day, usually at night, your entire body goes completely still and relaxed. This is the body's way of powering down. It needs this rest to recharge all your energy, just like a tablet or phone needs to be plugged in to charge its battery! The next line is one of the most exciting parts: "I show you strange visions while you are away." What are those strange visions? They are dreams! When you are in a deep sleep, your brain is still busy creating amazing, silly, or sometimes puzzling stories. The "while you are away" part means you are not paying attention to the real world, you are visiting dreamland, where anything is possible. The riddle also talks about time with the clue, "I take you by night, by day take you back." This describes your daily schedule. Sleep comes for you at night when the moon is out, taking you from your day. Then, when the sun rises, you wake up. You are "taken back" to the day ready to play, learn, and have fun. Finally, the riddle gives us a super important hint: "None suffer to have me, but do from my lack." This is the best clue of all! It means that when you are sleeping, you feel peaceful and comfortable. You don't suffer or feel bad when you are having good sleep. But if you don't get enough rest, you feel cranky, tired, and it is hard to focus on your schoolwork or games. That is what suffering from a "lack" of sleep means. All these secret clues put together perfectly spell out the answer: sleep.