I'm so fast you can't see me, though everyone else can see straight through me. I don't stop until the day you die. What am I?

Answer: The blink of an eye.

More Classic Riddles with answers

More Classic Riddles

I'm white, and used for cutting and grinding. When I'm damaged, humans usually remove me or fill me. For most animals I am a useful tool. What am I?
If a dog is tied to a piece of rope that is 6m long, how can he reach a bone that is 7m away?
If a fender cost six dollars, what will a ton of coal come to?
If a man carried my burden he would break his back. I am not rich, but leave silver in my track. What am I?
If a rooster laid a brown egg and a white egg, what kind of chicks would hatch?
If a train was on its way to Florida and it tipped over, where would they bury the survivors?
If it takes 5 microwaves 5 minutes to cook 5 chickens, how long does it take 100 microwaves to cook 100 chickens?
If there is a Yellow house on Bluebird Lane, a Green house on Orange Street, a Pink house on Kitten Road, a Black house on Whitehorse Pike and a Purple house on Firebird hill, where is the White house?
If you break me I do not stop working, If you touch me I may be snared, If you lose me nothing will matter. What am I?
If you drop me, I'm sure to crack. Give me a smile, and I'll always smile back. What am I?
If you feed me, I live, but if you water me, I die. What am I?
If you have 10 peaches and take 7 peaches away, how many do you have?