Dhamma Talk in English by Tan Ajaan Maha Boowa, 17 January 1976.

The way of understanding a talk on Dhamma: the calmer the Citta, the deeper will be the understanding. The need for investigation of the five Khandhas. Without investigation there will be no understanding of their true nature, hence no freedom. The need for Samadhi: even an Arahant needs to rest his Citta. The calmer the Citta, the deeper will be the understanding in one's investigation.
Desanas of Tan Ajaan Maha Boowa
Translated into English by Ajaan Suchart Abhijato
Baan Taad Forest Monastery
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Abhijato