साधनौघैरनासन्गैरलभ्या सुचिरादपि ।
हरिणा चाश्वदेयेति द्विधा सा स्यात्सुदुर्लभा ॥
sādhanaughair anāsangair alabhyā sucirād api |
hariṇā cāśv adeyeti dvidhā sā syāt sudurlabhā ||
(Bhakti-rasāmṛta-sindhu: 1.1.35)
“Its [i.e., bhakti’s] being very difficult to attain is twofold: (1) [even] through loads of sādhana [performed] devoid of attachment [i.e., āsakti], it is unattainable even after a very long time, and (2) [even when sādhana is performed with attachment] it is not to be given by Hari quickly.”