When there is hunger – hunger and wanting to eat – where do you feel the hunger? And where does the wanting to eat happen? The difference is very clear. Where does the wanting to eat happen – is there a place for it? No, right? Do you see the difference between what is the body and what is the mind?
It’s the same with other feelings. If you take sadness or happiness, and you think you feel it in the body, what’s it that you feel in the body? Sensations, right?
And then if you take the quality of sadness, can you know the quality of sadness without the body?
In the same way as for hunger and wanting to eat, you will be able to see the difference between the sensations of the body that reflect the sadness, which are manifestations of the sadness, and the quality of sadness itself which is mental.