Truly, no book can be understood accurately without an accurate dictionary.
In my particular case, I prefer the Oxford English Dictionary because the primary written works I study are historical English Bibles.
The beauty of historical language is lost in the mire of current culture.
For who would know that "right" means "straight" and "wrong" means "to bend", as in, both are motions of direction where one goes one way while the other goes the other way? See images below for reference.
The Oxford English Dictionary teaches you so many things of the words that have been used and how they once were used in their proper context ... but culture ... changes what words mean, to where, meaning is lost and out goes the truth with it!
I encourage you ... find a dictionary to which you can tune your mind that is historically true and accurate. After that addition, then add to your knowledge what the writers of all ages try to write and what the speakers of all ages try to speak.
Therein lies truth ... to know how to speak, which is "to dict", thus, "dictionary".
Please consider the origins of the terms below and consider that a word is not text but text is about a word, and that a dictionary is a collective text about words that have been and that are said.