For archive (Updated on March 1, 2019)
The following Dhammapada verse is frequently quoted by Sayadaws and writers.
“Not to do any evil, to cultivate good, to purify one’s mind, – this is the Teaching of the Buddhas.”
It seems simple (at the basic level), but it also has a deeper meaning (at the metaphysical level).
The explanations may refer to Abhidhamma to expound what “kusala” (wholesome deeds) and “akusula” (unwholesome deeds) are.
References may also be made to the three “Seikhas” : sila (morality), sammadhi (concentration), and panna (wisdom).
Bhavana practices such as samatha (tranquility meditation) and vipassana (insight meditation) are needed to calm and purify the mind.