tayātma-bhūtayā piṇḍe
vyāpte sampūjya tan-mayaḥ
āvāhyārcādiṣu sthāpya
nyastāńgaḿ māḿ prapūjayet
taya -- by that form meditated upon; atma-bhutaya -- conceived of according to one's own realization; pinde -- in the physical body; vyapte -- which has become pervaded; sampujya -- perfectly worshiping that form; tat-mayah -- surcharged by His presence; avahya -- inviting; arca-adishu -- within the various Deities being worshiped; sthapya -- establishing Him; nyasta-angam -- having touched the Deity's various limbs with the chanting of appropriate mantras; mam -- to Me; prapujayet -- he should carry out all the details of worship.
The body of a devotee is pervaded by the Supreme Lord just as a house is pervaded by the glow of a lamp. Just as one gestures in a friendly way to indicate that a guest should enter one's house, one touches the body of the Deity, chants appropriate mantras, and enthusiastically invites the Supersoul to enter the form of the Deity. Since both the Deity and the Supersoul are the Supreme Personality of Godhead, they are not different. One form of the Lord can immediately become manifest in another.