Caitanya-caritāmṛta 4.164
kāma, prema, — doṅhākāra vibhinna lakṣaṇa lauha āra hema yaiche svarūpe vilakṣaṇa
[kaama, prema, — donhaakaara vibhinna lakshana lauha aara hema yaiche svaroope vilakshana]
Blended reading (Sanskrit + English inline)
kāma, prema, — doṅhākāra vibhinna lakṣaṇa lauha āra hema yaiche svarūpe vilakṣaṇa
Lust and love have different characteristics, just as iron and gold have different natures.
Purport
One should try to discriminate between sexual love and pure love, for they belong to different categories, with a gulf of difference between them. They are as different from one another as iron is from gold.
— A.C. Bhaktivedanta Swami Prabhupāda
My note
Source: vedabase.io