I am a double, or double-pi, and I have a double, or double double, at my double, or

I am a double, or duplicate, of the man whose double I am. I am his counterpart, his match, his counterpart, his duplicate, his duplicate

I am a brother of the Three Sisters, and a son of the same father and mother. My name is Time. I am younger than the youngest of the Three Sisters, and I shall never die.…