Thousands of Years of Waiting for This

I am like a confused fish, swimming aimlessly in the long river called time. When I was ten years old, a voice appeared in my head. When I turned 100, that voice appeared in my mind again. Thousands of years have passed in the blink of an eye, time has passed, and years have been tempered. Why do I live and why do I exist? I'm sure you'll know the answer soon.