The works of Ādi Śaṅkarācārya

Praśnottararatnamālikā

Verse 56

कः शुरो यो भीतत्राता त्राता च कः सद्गुरुः ।को हि जगद्गुरुरुक्तः शम्भुः ज्ञानं कुतः शिवादेव ॥ ५५ ॥

In plain words

Who is brave? Whoever stands between the frightened and their fear. And who does that standing? A true guru. Who is called the teacher of the whole world? Śambhu. And knowledge — where does it come from? From Śiva alone.

Close to the Sanskrit

Who is the hero? He who is a protector of the frightened. And who is a protector? The true guru. And who is said to be the teacher of the world? Śambhu. Knowledge — from where? From Śiva alone.