Lokantagamanasutta
“Nāhaṁ, bhikkhave, gamanena lokassa antaṁ ñāteyyaṁ, daṭṭheyyaṁ, patteyyanti vadāmi. Na ca panāhaṁ, bhikkhave, appatvā lokassa antaṁ dukkhassa antakiriyaṁ vadāmī”ti. Idaṁ vatvā bhagavā uṭṭhāyāsanā vihāraṁ pāvisi. Atha kho tesaṁ bhikkhūnaṁ acirapakkantassa bhagavato etadahosi: “idaṁ kho no, āvuso, bhagavā saṅkhittena uddesaṁ uddisitvā vitthārena atthaṁ avibhajitvā uṭṭhāyāsanā vihāraṁ paviṭṭho: ‘“nāhaṁ, bhikkhave, gamanena lokassa antaṁ ñāteyyaṁ, daṭṭheyyaṁ, patteyyan”ti vadāmi. Na ca panāhaṁ, bhikkhave, appatvā lokassa antaṁ dukkhassa antakiriyaṁ vadāmī’ti. Ko nu kho imassa bhagavatā saṅkhittena uddesassa uddiṭṭhassa vitthārena atthaṁ avibhattassa vitthārena atthaṁ vibhajeyyā”ti?
Traveling to the End of the World
“Mendicants, I say it’s not possible to know or see or reach the end of the world by traveling. But I also say there’s no making an end of suffering without reaching the end of the world.” When he had spoken, the Blessed One rose from his seat and entered his dwelling. Soon after the Buddha left, those mendicants considered, “The Buddha gave this brief summary recital, then entered his dwelling without explaining the meaning in detail. … Who can explain in detail the meaning of this brief summary recital given by the Buddha?”