bhakti-yogasya tat sarvam
sri-naradah uvaca-Narada Muni said; bhakti-yogasya-of the principles of devotional service; tat-those (blessings or benedictions offered by Lord Nrsimhadeva); sarvam-each and every one of them; antarayataya-because of being impediments (on the path of bhakti-yoga); arbhakah-Prahlada Maharaja, although only a boy; manyamanah-considering; hrsikesam-unto Lord Nrsimhadeva; smayamanah-smiling; uvaca-said; ha-in the past.