antaḥ-praviśya bhūtāni
yo bibharty ātma-ketubhiḥ
antaryāmīśvaraḥ sākṣāt
pātu no yad-vaśe sphuṭam
antaḥ-praviśya - entering within; bhūtāni - all living entities; yaḥ - who; bibharti - maintains; ātma-ketubhiḥ - by the functions of the inner airs (prāṇa, apāna, etc.); antaryāmī - the Supersoul within; īśvaraḥ - the Supreme person; sākṣāt - directly; pātu - please maintain; naḥ - us; yat-vaśe - under whose control; sphuṭam - the cosmic manifestation.
Through the mystic yoga practice called prāṇāyāma, the yogī controls the airs within the body to maintain the body in a healthy condition. In this way, the yogī comes to the point of trance and tries to see the Supersoul within the core of his heart. Prāṇāyāma is the means to attain samādhi, trance, in order to fully absorb oneself in seeing the Supreme Lord as antaryāmī, the Supersoul within the core of the heart.