sona sutta

"And what do you think: when the strings of your vina were too taut, was your vina in tune & playable?"

"No, lord."

"And what do you think: when the strings of your vina were too loose, was your vina in tune & playable?"

"No, lord."

"And what do you think: when the strings of your vina were neither too taut nor too loose, but tuned[1] to be right on pitch, was your vina in tune & playable?"

"Yes, lord."

"In the same way, Sona, over-aroused persistence leads to restlessness, overly slack persistence leads to laziness. Thus you should determine the right pitch for your persistence, attune[2]the pitch of the [five] faculties [to that], and there pick up your theme."