SB 12.4.30
na hi satyasya nanatvam
avidvan yadi manyate
nanatvam chidrayor yadvaj
jyotisor vatayor iva
Translation:
There is no material duality in the Absolute Truth. The duality perceived by an ignorant person is like the difference between the sky contained in an empty pot and the sky outside the pot, or the difference between the reflection of the sun in water and the sun itself in the sky, or the difference between the vital air within one living body and that within another body.