The Buddha Gotama said to Ananda, even for someone who understands the Dharma, it is not easy to teach the Dharma to others. The Dharma should only be taught when a person is able to. The teacher must teach with the thought,
I will explain how all effects have causes, and how to observe both effect and cause, for this is essential to understanding the Dharma.
I will explain those causes and effects step by step.
I will teach, motivated by compassion, not by reward.
I will teach without exalting myself, or disparaging others.
Gotama said “it is not easy to teach the Dharma, Ananda.”