I love this part of the song from Devon Ke Dev Mahadev. I try to tell you why:

Poorn hai Shiv, poorn main adhik kuch hota nahi

Shiva is complete, There is nothing that you can add to that completeness... Such is Hos completeness.

Poorn na badhta na ghatta- pata nahi khota nahi

This completeness of Shiva - there is no scope to increase and Shiva is such it cannot decrease, It does not become nothing and It does not get lost... Such is his completeness.

Shiv nivasit akeleho Nakshatr tarak shashtum

Shiv always existed alone, His companions were...