"It is He who has sent down to you the Book. Parts of it are definitive verses, which are the mother of the Book, while others are metaphorical. As for those in whose hearts is deviance, they pursue what is metaphorical in it, courting temptation, and seeking its interpretation. But no one knows its interpretation except Allah and those firmly grounded in knowledge; they say, ‘We believe in it; all of it is from our Lord.’ And none takes admonition except those who possess intellect." Qur'an 3:7
as salam alaikum
the verse 3:7 does not speak about Sunnis or Shi'as. Rather it says that we should not make ta'wil of mutashabih verses. For example, in reference to the fruits of paradise it is said: "Whenever they are provided with its fruits for nourishment they will say:- This is the what we were provided before!-. But they were given something resembling it" (2:25). Here the believer should not force himself to conceptualize the nature and the taste of the fruits of paradise as its reality (ta'wil) does not belong to this world and it will be given to him in the next life insh'Allah.
With prayers for your success.