தெய்வமென் றுன்னைச் சாரவே யென்னைச்சேர வொழித்தா யருணாசலா
தெய்வம் என்று உன்னை சாரவே என்னை சேர ஒழித்தாய் அருணாசலா
In plain words
I came up to you and called you God. That was the mistake, if it was one — you cannot call something God without standing outside it. So you got rid of the one who was standing there. And that was the joining. There was no other joining coming.
Word for word
The moment I approached you, calling you God, you did away with me — so as to join me. O Arunachala!