to stay at Wat Thung Sawaang in Nong Khai for a little more than three months. In May of that year, 1942, I left Nong Khai for the town of Sakon Nakhorn, and from there went on to the monastery where Ven. Acariya Mun was staying in Baan Khoak, Tong Khoam Township, Muang District, Sakon Nakhorn Province. When I reached the monastery, I found him doing walking meditation in the late evening dusk. 'Who's that?' he asked, so I told him who I was. He then left his meditation path and went to the meeting hall — he was staying in a room there in the meeting hall — and conversed with me, showing a great deal of kindness and compassion for the incredibly ignorant person who hadis a monk's true duty. Mental seclusion refers to the peace of mind endowed with the inner effort of the practice to keep it from running wild with the things that make contact. You rein it in so as to keep it still with watchfulness and restraint at all times. The nature of this level of mental peace is that even though external things may not be making any disturbance, there are still some enemy preoccupations lurking within the mind. This is why this level is termed simply mental seclusion, seclusion from the disturbance of external objects. As for seclusion from the defilements, this refers to peace with regard to such external things as sights, sounds, smells, and tastes, as well as to peace with regard to internal