Buddha Vacana (October 22, 2555)
Say one dwells contemplating mental states; ardent, clearly conscious and mindful – having put aside the attraction and repulsion of the world. As he does this, either some bodily feeling arises, some bodily discomfort arises, or drowsiness scatters his thoughts to outward things. Then he should direct his attention to some pleasurable object or thought. Having done that, gladness arises, from gladness comes joy, because of joy the body is tranquil, with a tranquil body one is happy, and the mind of one who is happy becomes concentrated. Then he thinks: ‘The aim on which I set my mind is now attained. So let me withdraw my mind from that pleasant thought.’ Then he withdraws his mind from that, and neither starts nor carries on contemplating thought processes. Then he is mindful and knows, ‘Logical and wandering thoughts have stopped, I am inwardly mindful and happy.’
-- S.V,156 (Samyutta book V verse 156 -- taken from DPR)
mental states: ฌาน, jhāna: concentration of mind, meditation
ardent: สว่าง สดใส กระจ่าง, กระตือรือร้น, glowing, radient, eager
Logical thoughts: scientific thinking by keeping causes and effects in a consistent chain or a system of logics.
Buddhists see logical thoughts as 'conditioned thoughts', not 'pure or perfect knowledge' which arises from personal experience.>