No, thank you! You are excellent! Yes, I am Orthodox. Ok, regarding the concept of gilgulim, from what I can tell, it isn’t exactly heretical, here’s why. In Judaism, the belief is that one has to complete most of all the laws, no one can do all 613, its impossible, for example, one a king can do certain mitzvot, regardless, the soul comes back until most of his or her duties are completed (it is a myth that women DON’T reincarnate, it just doesn’t happen often). So the reason why it isn’t heretical is because it doesn’t offend to concept of heaven and hell, since after the soul has completed the given task, it then afford the opportunity to either enter Gehenna (not a place of fire and brimstone) to review its life and missed opposites for, about 12 months, and then ascends into heaven until the time of the Messiah (now whether its really the other way around, who knows for sure, again, there are many opinions).
Now, I will show you just two sources from Tanakh which may HINT at reincarnation, please, I don’t mean to offend any other Catholics out there. This is just our belief.
2 places:
The first is found in Iyov (Job) 1:21, where it says:
“…From my mother’s womb, I emerged naked, and I will return there naked…”
So this is interesting, what does he mean? Perhaps he is again reincarnated? Who can tell for sure.
The second source comes from Kohelet (Ecclesiastics), K’tuvim. It says:
דּ֤וֹר הֹלֵךְ֙ וְד֣וֹר בָּ֔א וְהָאָ֖רֶץ לְעוֹלָ֥ם עֹמָֽדֶת
In English, that means, “A generation goes and a generation comes, but the earth endures forever.”
Well, what does that mean? It is unusual, very so, for it never happens that a generation is born without the former still alive, but if this verse is taken literal, it makes no sense. Again, none of these two promote the idea per se, they are just, as some have interpreted, mere hints.
It is also important to note that some great thinkers REJECTED it, this would include the famed R. Saadiya Gaon, who, to be mild, called reincarnation a “foolish” idea. But that was his opinion, haha.
So again, perhaps a good response to Iyov (Job) was that he was punished for a past live on earth and needed correction (as opposed to taking Gehenna).