I don't agree with that statement at all. Of course the explicit words to that effect aren't there, but neither are a lot of other things ... an orthodox, detailed explanation of the Trinity, for example. It had to be deduced. "I don't see it" isn't the same thing as "it isn't in there".
...Why hasn't Mary give me that grace???
God gives us graces through Mary, ultimately because God gave us Christ, the source and font of all grace, through Mary.
The answer to your question is the same for any question of the form "Why doesn't God give grace X to person Y?"
He sovereignly chose not to, for reasons that may not be comprehensible to us, but are certainly both holy and just. Or, he chose to give those graces, but in a manner that person Y could resist them if Y so chose ... and Y did choose to resist that grace.
(That verse in Romans about potter and clay isn't only found in the Calvinist Bible.)
God hasn't given you that grace through Mary yet, as far as you know!
We're still prayin' for you. Straight to the Big Man, and through our brothers and sisters in heaven. ;-)
I don't own a Calvinist Bible...
Of course the explicit words to that effect aren't there, but neither are a lot of other things ... an orthodox, detailed explanation of the Trinity, for example. It had to be deduced. "I don't see it" isn't the same thing as "it isn't in there".
Exactly...Just as Sola Scripture is in there...
However, as I said, there is nothing in the scripture that even remotely suggests that God's grace comes thru Mary...You can use a million watt searchlight and you won't find anything about that issue, other than to find that God's Grace comes from God...