I was digging out some of my old notes recently, and came upon a section in which I had been putting up some of the various frameworks from the 37 Factors of Bodhi, side-by-side for comparison.
Along with these, I have also put the 5 steps to samadhi, which is sort of an unnamed framework that is embedded within many sutras of the EBT’s, but which is never formalized with its own name.
Notice the common themes, and especially the common framework of mindfulness leading to samadhi. That relationship really just leaps out across these all. For those thinking that the 5 steps to samadhi does not contain this pattern, though, think again… The sutras themselves always include some mindfulness or mental purity being cultivated that leads up to the first step.
Mindfulness here is generally defined as the Four Bases of Mindfulness, which go from coarse to subtle, and which are also among the 37 Factors. The other major form of mindfulness present in the SA is anapana, which is described in terms of one way to practice the Four Bases of Mindfulness.