That is correct. That does not mean that one can make unsubstantiated claims, though.
We then take by faith and accept God's word whether we fully "get" everything or not.
Accepting it is one thing; putting His instructions into practice is another.
We "Protestants" also believe in "mysteries" and we acknowledge that when the day comes when we have the "mind of Christ" and we will "know even as we are known", then it will all make sense. What a glorious day that will be!
Agreed. However, one cannot defer the justification of one's current beliefs and practices to some undefinable understanding in the future and use that as current proofs.
Granted we should not cop-out by calling something a "mystery" when God's word clearly states a particular doctrine. My point was that some want to beat a subject to death trying to put into words a concept that cannot be explained completely or even adequately at some point. There are things we MUST take by faith because God says it regardless of whether we understand it fully. I think some of the theologians of yesteryear, and even today, pontificate in tome after tome trying to explain what is impossible to humanly explain. Their endless ramblings have even been accepted by some as truth on par with Holy Scripture because it just sounds so intellectual. I read some of them and it's enough to put me to sleep. How many words can be used to explain what is humanly impossible to comprehend? I think some just liked to hear themselves talk - not that I am ever guilty of that ;o).