Uddesavibhaṅgasutta untranslated

Uddesavibhaṅgasutta. The Buddha utters the brief statement that a monk should always so guard his mind that it may not be externally diffused nor internally set. The monks repeat this statement to Mahā Kaccāna, who gives a detailed exposition thereof. When the Buddha is told of Kaccāna’s explanation, he praises his erudition (MN.iii.223ff).