The Jīva (soul) and the Pudgala (physical substances) coalesce with each other through sneha (which is like the mutual attraction between them); soul has the inherent power of attraction and matter that of being attracted.
anyo'nyaṃ snehapratibaddhā iti. Yadāha- snehābhyaktaśarīrasya, renunā śilyaṣyate yathā gātram.
rāgadveṣaklinnasya karmabandho bhavatyevam...
(Bhaga 1.312 Vṛ)