कालयापनायामसमर्थत्वमौत्सुक्यम् । … उत्कण्ठा च तस्यैव सूक्ष्मावस्था ।
kāla-yāpanāyām asamarthatvam autsukyam | … utkaṇṭhā ca tasyaiva sūkṣmāvasthā |
(Durgama-saṅgamanī-tīkā on Bhakti-rasāmṛta-sindhu: 2.4.194)
“‘Eagerness’ (autsukya) is incapability to pass time [i.e., being so eager for something that it becomes difficult to pass time unless and until one attains that object], … and ‘longing’ (utkaṇṭhā) is a subtle state of that itself [i.e., of eagerness].”