kāma, prema, — doṅhākāra vibhinna lakṣaṇa
lauha āra hema yaiche svarūpe vilakṣaṇa
kāma - lust; prema - love; doṅhākāra - of the two; vibhinna - separate; lakṣaṇa - symptoms; lauha - iron; āra - and; hema - gold; yaiche - just as; svarūpe - in nature; vilakṣaṇa - different.
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.