Reclassification of nouns; from uncountable to countable in the plural

Hi. I think the questions posed/asked here are difficult to answer even for the expert teachers in this forum (then again, I am not sure), but if they are, any help from you teachers would be appreciated. I think it is common knowledge that an uncountable noun can be turn into a countable noun by making it into its type and instance or example.

For example, the "sorrows," in my view, are things that make you sorrowful, and in my opinion, this is a case of making the word "sorrow" from an uncountable noun into a countable noun by making it into examples. Then if we write the words "evidences," it is, in my opinion, mostly likely being used to mean types of evidence, not incidences or examples. But, then again, I don't really know whether the "evidences" could mean examples or instances of "evidence." I think it is possible. I think this is where my difficulty lies. I don't know whether a certain uncountable noun written in the plural is used as examples or instances, or types. For me, some words lend themselves to one of the categories fairly easily -- like the words in the plural "energies" and "steels," to me, surely mean types of the word "energy" and "steel" respectively. The basis for this, for me, is the nature of the words "energy" and "steel" and I think, used in the sense they are normally used, it would be almost impossible to come up with a sentence that uses either of those words as its examples or instances (if I am not wrong).

Now, could you help me discern whether the following are examples, instances or types of the uncountable nouns? Is there any guide that would help me in this matter (I hope my questions are clearly asked and thus you know what matter I am talking about)?

1. You should understand inevitabilities of miracles

2. Despise not prophesyings.