10.
The Discourse on Concentration as Root and Acting Suitably
671.
At Sāvatthī.
"Monks, there are these four meditators.
Which four?
Here, monks, a certain meditator is skilled in concentration regarding concentration, but not one who does what is suitable regarding concentration.
Here again, monks, a certain meditator is one who does what is suitable regarding concentration, but not skilled in concentration regarding concentration.
Here again, monks, a certain meditator is neither skilled in concentration regarding concentration, nor one who does what is suitable regarding concentration.
Here again, monks, a certain meditator is both skilled in concentration regarding concentration and one who does what is suitable regarding concentration.
Therein, monks, the meditator who is both skilled in concentration regarding concentration and one who does what is suitable regarding concentration is the foremost and the best and the chief and the highest and the most excellent among these four meditators.
Just as, monks, from a cow comes milk, etc.
and the most excellent."
The tenth.