As far as they go, they're not exactly faith-based concepts in and of themselves - more of an attribution(s) to aspects of the self, the universe (micro and macro) and to the logical way things effect each other. I think with Hinduism though, there is a general vagueness overall which the "religion" is known for, where such concepts are often interpreted (literalism vs metaphoricalism, divine vs mundane etc) to extremely far extents - which does make it a unique "religion" (as it's a shared pantheon of separate religions like Abrahamism), blah blah.
I agree with you, skepticism is always a basis of my thinking - however positive or negative it may be.
When I said those things I didn't mean them in the context of applying logic to them or making sense, but rather that no amount of sense-making will do. Our brain largely categorizes things by limitations... How is that which is limitless or infinite going to be understood by the mind? We can describe things like Brahman or Atman via metaphor like poetry, but ultimately those are beyond description like true love. They must be experienced, no other mechanism conveys the truth completely.
As far as skepticism, even that can be carried too far. Prove me this, prove me that, when the thing sought after is a subject without an object it becomes impossible to use these methods to gain the knowledge. Thus, I was trying to shift the impetus from your intellect to awareness. What you know via awareness is far more important than anything you've rationalized, believe, or read. Logic in this realm in particular can be an asset as long as these limitations are fully understood, if they are not it's a tar pit. It can lead you to the proper course as much as it can betray you. So, careful application is necessary...