Listening from Scholars

Once our teacher ,who was very much experienced,scholar and noble told us-If the person to whom you are listening is great,scholar and saint like ,then never interrupt him ,never cross question him,while he is delivering lecture or saying something.just learn, remember,mug what he told/said .In due course of time(i.e. may be two years,five years)you will automatically understand the meanig what actually we was telling ,based on his vast experiences,when you yourself will be competent or experienced enough......