The natural assumption here is that the 'she' is Thomas's mother or some other loving female relative and that he is a child. However, they could equally both be adults, say professor and student.
If he is a child, she might actually be a nanny or tutoress who can't stand the little blighter...that is, she may not care a good goldarn for the world about HIM but does for the world about HER. Nevertheless, as a dutiful employee, she has taught him many things and - as a result - he has acquired many of her views, albeit he is applying them in a different way.
If you use 'them', as I suggested earlier, you cover both possibilities; namely, that these two people may occupy what amounts to separate worlds or the same world. (Yes, I know there is only one actual world in a physical sense but, in another way, we each occupy our very own world.)
Stick with 'them'.