bhakta - devotee; bhakti - devotional service; kṛṣṇa-prema - love of Kṛṣṇa; tattvera - of the truth of; nidhāra - ascertainment; vaiṣṇavera kṛtya - duties of a Vaiṣṇava; āra - and; vaiṣṇava-ācāra - characteristics of a Vaiṣṇava.

“You shall have to ascertain the basic principles of a devotee, devotional service, love of Godhead, Vaiṣṇava duties and Vaiṣṇava characteristics.