If I think of the Noble Eightfold Path for example, or even the Abhidhamma traditions, I feel mental factors are clearly related, but noted as separate.
In sum, my question mainly is: What conditions cause mental factors/qualities to aggregate, i.e. lead to the development of others, and what conditions cause them to remain separate? Is there a unique condition (e.g. a mental factor) that unites others in the mind?
In non-Buddhist sources, strong pleasure as in addiction seems to channel the mind towards doing but one thing, to exclude in a way causing shame. But positive emotions such as joy tend to broaden one's perspective and capacity of action. A researcher on this says:
But as the sun rises in the sky, things begin to change. Your blinders around your face begin to open and your world quite literally expands. You can see more. Your world is larger.
Just as the warmth of sunlight opens flowers, the warmth of positivity opens our minds and hearts. It changes our visual perspective at a really basic level, along with our ability to see our common humanity with others.
Can this be related to this question?