But Indra, before he had returned to the Devas, saw this difficulty. As this self (the shadow in the water) is well adorned, when the body is well adorned, well dressed, when the body is well dressed, well cleaned, if the body is well cleaned, that self will also be blind, if the body is blind, lame, if the body is lame, crippled, if the body is crippled, and will perish in fact as soon as the body perishes. Therefore I see no good in this (doctrine).

In plain words: On his way home, Indra sees a problem. If the reflection changes with the body, then it will be blind if the body is blind, lame if the body is lame, and it will die when the body dies. So he decides this teaching is no good.