SB 5.7.9
yatra ha vava bhagavan harir adyapi tatratyanam nija-jananam vatsalyena sannidhapyata iccha-rupena.
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
At Pulaha-asrama, the Supreme Personality of Godhead, Hari, out of His transcendental affection for His devotee, becomes visible to His devotee, satisfying His devotee’s desires.
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
The Lord always exists in different transcendental forms. As stated in Brahma-samhita (5.39):
ramadi-murtisu kala-niyamena tisthan
nanavataram akarod bhuvanesu kintu
krsnah svayam samabhavat paramah puman yo
govindam adi-purusam tam aham bhajami
The Lord is situated as Himself, Lord Krsna, the Supreme Personality of Godhead, and He is accompanied by His expansions like Lord Rama, Baladeva, Sankarsana, Narayana, Maha-Visnu and so forth. The devotees worship all these forms according to their liking, and the Lord, out of His affection, presents Himself as arca-vigraha. He sometimes presents Himself personally before the devotee out of reciprocation or affection. A devotee is always fully surrendered to the loving service of the Lord, and the Lord is visible to the devotee according to the devotee’s desires. He may be present in the form of Lord Rama, Lord Krsna, Lord Nrsimhadeva and so on. Such is the exchange of love between the Lord and His devotees.