Sādhana Pāda · Sutra 44
स्वाध्यायादिष्टदेवतासंप्रयोगः
svādhyāyāt iṣṭa-devatā-saṃprayogaḥ
From self-study arises union with the chosen deity.
Deep svādhyāya leads to saṃprayoga (union, communion) with iṣṭa-devatā, the personally chosen deity.
This sutra has two levels of reading:
Externally, the study of sacred texts—especially the repetition of mantras—invokes the presence of the divine. Texts are vehicles of spiritual transmission.
Internally, deep self-observation reveals the divine presence within oneself. The true object of study is the Self, and to know it is to find God.
Iṣṭa-devatā recognizes that the divine manifests in many forms. Each practitioner has an affinity with a particular aspect of the sacred.