Well, I suppose no object exists without a subject, so that of anything that exists, it either belongs to the object, or relates to the subject’s experience of the object.
So that for any feeling, we can say, that it must have some correlate as an object, or the object itself must be in the subject, as in introspection.
So if we’re to look for truth in subjectivity, we could start with a simple question.
Is feeling about the object, whether within or without, infinite or is it finite?
Are there an infinite number of feelings,
Or are the multitude of such an infinite combination of a limited few?
If less than infinite, then feelings themselves must be able to abstract and recombine from a limited set of possibilities, to process every possible experience.