yaḥ - anyone who; śāstra-ādiṣu - in the revealed scriptures; anipuṇaḥ - not very expert; śraddhāvān - full of faith; saḥ - he; tu - certainly; madhyamaḥ - second-class or middle-class devotee.

“ ‘He who does not know scriptural argument very well but who has firm faith is called an intermediate or second-class devotee.’