Suppose that, upon checking, a mendicant knows this: ‘I am often covetous, malicious, overcome with dullness and drowsiness, restless, doubtful, irritable, corrupted in mind, disturbed in body, lazy, and not immersed in samādhi.’ In order to give up those bad, unskillful qualities, they should apply extraordinary enthusiasm, effort, zeal, vigor, perseverance, mindfulness, and situational awareness. Suppose your clothes or head were on fire. In order to extinguish it, you’d apply extraordinary enthusiasm, effort, zeal, vigor, perseverance, mindfulness, and situational awareness. In the same way, in order to give up those bad, unskillful qualities, that mendicant should apply extraordinary enthusiasm …

But suppose that, upon checking, a mendicant knows this: ‘I am often content, kind-hearted, rid of dullness and drowsiness, calm, confident, loving, pure in mind, undisturbed in body, energetic, and immersed in samādhi.’ Grounded on those skillful qualities, they should practice meditation further to end the defilements.”

Numbered Discourses 10.54 6. Your Own Mind Serenity

“Mendicants, if a mendicant isn’t skilled in encompassing another’s mind, then they should train themselves: ‘I will be skilled in encompassing my own mind.’