CC Antya 2.157

ākāra nā dekhi, mātra śuni tāra gāna’
svarūpa kahena, — “ei mithyā anumāna
Synonyms: 
ākāra — form; dekhi — we cannot see; mātra — only; śuni — we hear; tāra — his; gāna — singing; svarūpa kahena — Svarūpa Dāmodara said; ei — this; mithyā — false; anumāna — guess.
Translation: 
“We cannot see his material form,” they said, “but still we hear his sweet singing. Therefore he must have become a ghost.”
Purport: 

Svarūpa Dāmodara, however, protested, “This is a false guess.