भक्तिरसायन - भगवद्धर्म

द्रुतस्य भगवद्धर्मात् धारावाहिकतां गता ।
सर्वेशे मनसो वृत्तिः भक्तिरित्यभिधीयते ॥

- भक्तिरसायन

drutasya bhagavat dharmaat dhArAvAhikatAm gatA ।
srveshe manaso vRuttiH bhaktiH iti abhdhIyate ॥

- bhaktirasAyana

What is devotion? When one's mind dissolves itself (and flows like a torrent) in God thinking about the immeasurable qualities (like compassion) of Him - it is called Devotion.

- Bhakthirasayana