增壹阿含經 19.1.p2

19.1.p2

Soon after he had attained enlightenment, the Bhagavān had this thought: “Now, my teaching is profound, hard to understand, hard to comprehend, and hard to recognize. It’s inconceivable, at rest, and subtle. It’s recognized by wise people who can discern its purpose and principle. Training untiringly, they then will become joyous. Supposing I were to explain this wonderful teaching to people, some of them wouldn’t believe it and wouldn’t approve of it. It would be a waste, it’d be troublesome, and it’d be for nothing. Quietude would be fitting for me now. What need is there to explain this teaching?”