In the secular world, a human being is mostly thought of as consisting of a body and some kind of spiritual component. A lot of the current understanding of how these "parts" interact comes from the greek period - I think. The Human consisting of a body that is subject to desires and sin and a spiritual part which is more or less capable to counter those tendencies and a soul in between for humans to choose which side they want to incline towards.
While reading it occured to me that this view might not fit very well into how the Torah portraits humans. For one, Bereshit 2:7 says, that humans did not get a nephesh, they became a living nephesh when G-d breathed his nshamah into him. In 9:4 it says, that blood is the sign of the nephesh (so not a completely spiritual/invisible thing) and contrary to the greek idea, a nephesh can be both alive (Bereshit 2:7) and dead (Vayiqra 21:11) and therefore is (or seems to be) not eternal as the greeks understood it. And besides the nephesh, we also have G-ds ru'ach in us (Bereshit 6:3), which we can apparently loose (and die), but e.g. Iyyobh 4:9, 27:3, 32:8 suggest that they (ru'ach & nephesh) both convey the same idea or concept. Maybe the heart fits better into the role of deciding whether to follow G-ds commands or our own desires (e.g. Mishlei 16:9, 19:3, 20:9 in contrast to the Shema Yisrael)?
And we haven't even touched the spiritual part (which provides the will to follow G-d). Is it something in us? Or is it just by studying the Torah that our desires somehow change? What about Yehezqiel 36:26-27? Is the heart the thing that provides the will?
As you might have guessed by now I'm currently not quite grasping how the Tanakh understands humans and have a difficult time to wrap my head around this different mode of thinking about this topic. I would be thankfull for any attempt to clarify the different roles of the different aspects or parts of a human being.
Also feel free to add some more tags, I didn't find any that seemed to fit.