The Water-Snake Simile
The Lord Buddha said:
"Monks, there is the case where some worthless men study the Dhamma: dialogues, narratives of mixed prose and verse, explanations, verses, spontaneous exclamations, quotations, birth stories, amazing events, question & answer sessions [the earliest classifications of the Buddha's teachings]. Having studied the Dhamma, they don't ascertain the meaning (or: the purpose) of those Dhammas with their discernment. Not having ascertained the meaning of those Dhammas with their discernment, they don't come to an agreement through pondering. They study the Dhamma both for attacking others and for defending themselves in debate. They don't reach the goal for which [people] study the Dhamma. Their wrong grasp of those Dhammas will lead to their long-term harm & suffering. Why is that? Because of the wrong-graspedness of the Dhammas.
"Suppose there were a man needing a water-snake, seeking a water-snake, wandering in search of a water-snake. He would see a large water-snake and grasp it by the coils or by the tail. The water-snake, turning around, would bite him on the hand, on the arm, or on one of his limbs, and from that cause he would suffer death or death-like suffering. Why is that? Because of the wrong-graspedness of the water-snake. In the same way, there is the case where some worthless men study the Dhamma... Having studied the Dhamma, they don't ascertain the meaning of those Dhammas with their discernment. Not having ascertained the meaning of those Dhammas with their discernment, they don't come to an agreement through pondering. They study the Dhamma both for attacking others and for defending themselves in debate. They don't reach the goal for which [people] study the Dhamma. Their wrong grasp of those Dhammas will lead to their long-term harm & suffering. Why is that? Because of the wrong-graspedness of the Dhammas.
"But then there is the case where some clansmen study the Dhamma... Having studied the Dhamma, they ascertain the meaning of those Dhammas with their discernment. Having ascertained the meaning of those Dhammas with their discernment, they come to an agreement through pondering. They don't study the Dhamma either for attacking others or for defending themselves in debate. They reach the goal for which people study the Dhamma. Their right grasp of those Dhammas will lead to their long-term welfare & happiness. Why is that? Because of the right-graspedness of the Dhammas.
"Suppose there were a man needing a water-snake, seeking a water-snake, wandering in search of a water-snake. He would see a large water-snake and pin it down firmly with a cleft stick. Having pinned it down firmly with a forked stick, he would grasp it firmly by the neck. Then no matter how much the water-snake might wrap its coils around his hand, his arm, or any of his limbs, he would not from that cause suffer death or death-like suffering. Why is that? Because of the right-graspedness of the water-snake. In the same way, there is the case where some clansmen study the Dhamma... Having studied the Dhamma, they ascertain the meaning of those Dhammas with their discernment. Having ascertained the meaning of those Dhammas with their discernment, they come to an agreement through pondering. They don't study the Dhamma either for attacking others or for defending themselves in debate. They reach the goal for which people study the Dhamma. Their right grasp of those Dhammas will lead to their long-term welfare & happiness. Why is that? Because of the right-graspedness of the Dhammas.
"Therefore, monks, when you understand the meaning of any statement of mine, that is how you should remember it. But when you don't understand the meaning of any statement of mine, then right there you should cross-question me or the experienced monks.
Adepted from Alagaddupama Sutta: The Water-Snake Simile translated from the Pali by Thanissaro Bhikkhu