Can't Be Seen

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

Answer: A blink of an eye.

Source: https://www.riddles.com/154

I'm so fast you can't see me, Though everyone sees straight through me, I don't stop until the day you die. What am I? — Can't Be Seen by Anonymous v1.

Riddle: I'm so fast you can't see me, Though everyone sees straight through me, I don't stop until the day you die. What am I? Answer: A blink of an eye. — by Anonymous v2.