In the preceptor there is the knowledge of science. The knowledge of sciences and the means to be applied are in the son of Pandu. Heroism exists in Drona whereas both heroism and mighty exist in the son of Pandu.
ज्ञानमेकस्थमाचार्ये ज्ञानं योगश्च पाण्डवे। शौर्यमेकस्थमाचार्य बलं शौर्यं च पाण्डवे॥