Meaning: One who knows Brahmatatva never fears.
Reference: The present shloka has been taken from 'तैत्तिरीयोपनिषेद'. This mantra says that the devotee who return without achieving any sort of joy with the mind realises Brahmatatva and exists in all movable and immovable matters. Due to the realisation of Brahmatatva, any sort of joy or misery does not affect him. According to the Gita, one who is free from all the vicissitudes and remains stable in any sort of joy or misery, focus on the supreme being and enjoys the bliss never fears from anybody.
Thus, being fearless and engrossed in bliss, he is the true scholar of Brahmatatva.