(Nrsimha-deva speaking to Prahlad)

When a devotee looks at Me without hesitation and speaks to Me affectionately, My pleasure grows with every new moment. Although I am eternally free from all limitations, such behavior binds Me with ropes of love. Although I am unconquerable, My devotees can conquer Me. And although I am subject to no one's control, I become their subordinate subject. I belong only to him who has shown his love for Me by giving up all affection for family and possessions, and such a devotee also belongs to Me. Neither he nor I has any other true friend. My desires are always automatically fulfilled, but I take various births in this world just to bestow on My devotees the satisfaction of all their desires.

Hari-bhakti-sudhodaya (14.28–32), quoted in Brhad Bhagavatamrta 1.4.9, by Srila Sanatana Goswami Prabhupada