Allow me to propose an analogy.
(Wow! Who saw THAT coming?)
If you look at stuff directly, you come to Aristotle's conclusion that things slow down unless some force is applied to them, that heavy things tend toward the center of the earth while light things, like fire, tend upwards, blah blah.
But if you back off a little, refine your frame of reference, you might come to see that Newton's laws make it far easier to account "elegantly" for what you observe. Things tend to keep on going, unless forces act on them to change their direction or speed. That wasn't a no-brainer.
So this is KIND of a little sort of my experience with the Bible. If you are asking could I prove these two sorts of consequence to sin if I had nothing but the Bible, I'd have to say that I don't think I could do so, at least not persuasively.
But once I, stand back and think, and read Aquinas and stuff, and then turn and come back, I see it in lots of places -- and not just in the Bible but in life as we allegedly know it.
Its kind of like that with the Trinity. If I wrap my mind around the doctrine as much as I can and then go back and look at the sayings of Jesus about his relationship with the Father, and Paul's words about the Spirit, and even the Creation story in Genesis, suddenly it starts to fit into place.
Is that an answer?
Ahhh...Yes, and it may surprise you to read that is an answer I do understand, really do understand even as I find it a refined version of hammering a square peg into a round hole. Yes, an answer and not yours alone.