Limit Unknown

Riddle: Forward and forward I go, never looking back. My limit no one knows, more of me do they lack. Like a river I do flow, and an eagle I fly. Now can you guess, what am I?

Answer: Time. I am time!

Source: https://www.riddles.com/760

Riddle: Forward and forward I go, never looking back. My limit no one knows, more of me do they lack. Like a river I do flow, and an eagle I fly. Now can you guess, what am I? Answer: Time. I am time! — by Anonymous v1.

Riddle: Forward and forward I go, never looking back. My limit no one knows, more of me do they lack. Like a river I do flow, and an eagle I fly. Now can you guess, what am I? Answer: Time. I am time! — by Anonymous v2.