yajñasya ca vitānāni
yogasya ca pathaḥ prabho
naiṣkarmyasya ca sāṅkhyasya
tantraṁ vā bhagavat-smṛtam
yajñasya—of sacrifices; ca—also; vitānāni—expansions; yogasya—of the mystic powers; ca—also; pathaḥ—ways; prabho—O my lord; naiṣkarmyasya—of knowledge; ca—and; sāṅkhyasya—of analytical studies; tantram—the path of devotional service; —as well as; bhagavat—in relation with the Personality of Godhead; smṛtam—regulative principles.
Please also describe the expansions of different sacrifices and the paths of mystic powers, analytical study of knowledge, and devotional service, all with their respective regulations.
The word tantram is significant herein. Sometimes tantram is misunderstood to be the black spiritual science of materialistic persons engaged in sense gratification, but here tantram means the science of devotional service compiled by Śrīla Nārada Muni. One can take advantage of such regulative explanations of the path of devotional service and make progressive advancement in the devotional service of the Lord. Sāṅkhya philosophy is the basic principle of acquiring knowledge, as will be explained by the sage Maitreya. The Sāṅkhya philosophy enunciated by Kapiladeva, the son of Devahūti, is the real source of knowledge about the Supreme Truth. Knowledge not based on the Sāṅkhya philosophy is mental speculation and can yield no tangible profit.

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