What is an iṣṭa-devatā, and how do I find mine?
your iṣṭa-devatā is the form of God your heart is most drawn to; it is usually discovered through devotion, a guru’s guidance or family leaning, not assigned by rule.
Iṣṭa means “beloved” or “chosen”. Hindu tradition accepts that one Divine can be approached through many forms, and that each person will feel closest to one — Kṛṣṇa, Rāma, Śiva, the Devī, Gaṇeśa, Hanumān, Murugan and so on. That form becomes the centre of your japa and inner prayer, while you still honour all the others.
How people find it: notice which name comes to your lips in difficulty, which temple makes you feel at home, which stories move you. A guru may give a mantra of a particular deity at dīkṣā, which settles the question. Many simply continue the family’s main deity. Some astrologers also look at the birth chart, for example through the Jaimini method, as one indication among others.
There is no wrong choice and no need to hurry. The relationship deepens with time. If your situation is specific, Ask Chiluka.
Iṣṭa = beloved, chosen · Source: bhakti and Smārta (pañcāyatana) tradition
Dharma Q&A — worship at home · Ask a Jyotishi your own question