No, I don’t think so. That would presuppose that we have already fully experienced something (joy, for example), just not in a quantitatively “full” way. But this is only seeing a small portion of the picture and is presumes that we are capable, in our human and earthy existence, of experiencing all that there is to experience. In other words, you are trying to fit “eternity” into our finite understanding.
For example, what if I never knew that I could eat an apple? So, here I have 1 apple. I can experience that apple by looking at it and seeing its color and general appearance. I can even experience that apple by touching it and feeling its texture, or I can smell it and experience it still more. To experience it more fully still, I can put it under a microscope and see the finer details. Have I experienced the apple yet? Sure, sort of. But what if I go now to an electron microscope and experience that apple by seeing the atoms it’s made of, etc…? Have I experience that apple? No, not fully. So, when I finally realize it is food and I eat it, I am experiecing that apple in a way I never knew, and am more fully experiencing it…this 1 apple. Yet even still, have I experience that apple in its FULLNESS? I would guess not. It’s still an apple, and just the 1 apple. It’s “quantity” has never changed during my increasing experience of it. The “quality” of that apple has also not changed. It’s the same one that I started with. What changed was fullness with which I experienced it.
Now, this example will eventually fail, as most do. But you can get the gist of it.
I can experience “joy” here on earth. But in eternity I will experience it in its fullness. Not only can I then experience it more fully for what “joy” truly is, but it will also be eternal. That does not necessarily conclude in a quantitative measure.
When the Pope talks of ‘infinite’ things he means they are eternal rather than endlessly ‘upped in volume’?
I can’t speak for the Pope. But when I hear “infinite” in realtion to Church teaching, I think if that which has no beginning and no end, as they are…for what they are. I’m not sure I could explain that any other way than I have. This is where my limited understanding must rely on others who can understand and explain it better than I ever could hope to. That’s why I recommend the book that I did above: “Theology for Beginners” by Frank Sheed.