The Causal Seed of Esoterica

"The covert intention with respect to interpretation refers to teachings given in a form which is extremely difficult to understand in order to pacify the fault of those who think:

This doctrine is inferior to others
Because it is easy to understand."

~ Dudjom Rinpoche
The Nyingma School of Tibetan Buddhism
Wisdom 1991 p 221

Encouraging Study

"Sometimes, in the Tibetan monasteries, a younger student or junior khenpo would review the teachings given by a senior khenpo. He might go over the teachings with the other monks. Perhaps they would study the teachings once or twice, and then get together and encourage one another. They often debated, asking each other difficult questions. This, too, is contemplation."

Khenchen Palden Sherab Rinpoche
PSL Shedra Series, Vol. 3 p 47