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.