There is wisdom in exploring concentration practice as a skilled means which one is intentionally developing. And, there is wisdom in exploring concentration as a phenomenon of a contented mind. This is the distinction of smatha or samadhi.
The arc of practice, going from noticing phenomena and their uniqueness to becoming intimate with their universal characteristics.
All this to free the heart.
When we can wisely relate to grasping, aversion, sleepiness/dullness, restlessness/worry and doubt as visitors rather than enemies, they can transform into their wisdom nature.
Note: Description of the gem of sleepiness is at the end of the next morning's instructional sit.
