All that glitters may not be gold but it is not nothing

The philosophy that the Absolute is true and this creation is false

(brahma satyam jagan mithya) is not accepted by Vaisnava philosophers.

The example is given that although all that glitters is not gold, this

does not mean that a glittering object is false. For example, an oyster

shell appears to be golden. This appearance of golden hue is due only to

the perception of the eyes, but that does not mean that the oyster shell

is false. Similarly, by seeing the form of Lord Krishna one cannot

understand what He actually is, but this does not mean that He is false.

The form of Krishna has to be understood as it is described in the books of

knowledge such as Brahma-samhita. Isvarah paramah Krishnah sac-cid-anandavigrahah:

Krishna, the Supreme personality of Godhead, has an eternal,

blissful spiritual body.

Srimad Bhagavatam 3.32.28 purport