References – AN 10.3: Virtuous Behavior 
“I appreciate your emphasis on clarity, stability, and spaciousness. How does concentration relate to these?” Answered by Ajahn Pasanno. [Clear comprehension] [Unification] [Spaciousness] [Concentration ] // [Pāli] [Thai] [Etymology] [Tranquility] [Happiness] [Rapture] [Conditionality]
Suttas: AN 10.3: Virtuous Behaivor; AN 6.10 Mahānāma [Virtue]
Quote: “The way my mind worked before was, ‘Boy, when I get my concentration together, I’m going to be happy...’” [Ajahn Pasanno]
Quote: “The happy mind is easily concentrated.” [Hindrances] [Relinquishment] [Knowledge and vision]