sounds OK?

 He will tell you the aspects of love that you haven't thought about.

e.g

・They will tell you some aspects of yourself that you are not usually aware of.

・They will tell you about some aspects of yourself that you are not usually aware of.

You tell someone a story, a narrative, the truth, a lie.

You don't tell someone a rabbit, a table, a book.

And neither do you tell someone an aspect, an attitude, a consideration, a parameter, a size, a shape.

In the latter cases, you tell someone (something) about a rabbit, table, book, aspect, attitude, etc. 

In short, you have to have about there.

CJ 

Taka

tell them the aspects of literature that they might want to consider.

tell them which aspects of literature they might want to consider.

i.e., tell them the answer to the question:  Which aspects of literature should we consider? 

to tell someone an answer is idiomatic, so indirect questions after tell are quite normal.

Tell me what you want to do next.

Jerry told me how he caught the fish.

Sally will tell me later where we can store the suitcases.

Otherwise, if I had to retain the aspects, I might have said We need to ... [list / enumerate] for them the aspects of literature ... or ... make them aware of the aspects ...

Apparently I am pickier than Ms. Benjamin on this point. 

CJ