One of Eliot's signatures is repetition.
> Significantly, there is the triple configuration of the line:
> ¬ "Who is the third*who walks always beside you?"
> "There is always another one walking beside you".
> "‚ÄĒBut who is that on the other side of you?"
> The triple emphasis here¬ appears¬ purposive,
> especially¬ vis-a-vis¬ the¬ denial of the supernatural dimension of life
> in The [modern] Waste Land.