Yitzchak and Rivka waited many years to have kids, until they davened.
The Medrash is quoted saying that Yitzchak didn’t take a Shifcha - maidservant- like Avraham did (Hagar) because he knew that he was an Olah Temima (from being brought up on the Akeidah). Thus because of that he couldn’t take a shifcha . I dont know why that should be a reason not to be allowed to take a shifcha - I’ve looked around , no answers. This Medrash is quoted in earlier seforim, see this sefer Divrei Shmuel (ספר דברי שמואל מאת הרב שמואל זנוויל בן חנוך מלובלין) for one such example:
So, seemingly Yitzchak was aware he was an Olah Temima.
Yet later in the parsha, when the famine came, Hashem comes to Yitzchak and tells him, “dont go down to Mitzrayim, because you are an Olah Temima” (see rashi).
Which is it? Was Yitzchak independently aware of the fact that he was an Olah Temima? Why did Yitzchak know on his own that he couldn’t take a shifcha due to being an Olah Temima , yet he didnt know that he couldn’t go out of eretz yisroel, because of him being an Olah Temima.
Both the Be’er Yitzchak and the Re’em explain that the prohibition for Yitzchak, as an Olah Temima to leave the land of Israel is because the Land had the category of an Azara - the sanctum of the Temple, where it is prohibited to take out Kodshei Kedoshim, and if you were to remove the Olah, it would become invalid.
To buttress the question further, why would Yitzchak independently rule out taking a Shifcha due to being an Olah Temima, despite there being no internal halachic reason vis a vis being an Olah Temima. Yet not rule going down to Egypt. Seemingly not taking into account his being an Olah Temima, thus necessitating G-d himself to pre-empt Yitzchak going down.
What is the reason to be distinguish between these two situations?
Was Yitzchak aware of being an Olah Temima or not?