Sentence:  As such , one cannot fully <WSD>understand</WSD> the thought of the pre-Han and Han periods without knowing the meanings inherent in the Lo Shu ; but , conversely , one cannot begin to understand the Lo Shu without knowing something about the world view of the Old Chinese , which they felt they saw expressed in it . 
Meaning of the word marked with <WSD> tags:  know and comprehend the nature or meaning of