Sentence:  A contrast of the scripture reading of , let us say , St. Augustine , John Bunyan , and Thomas Jefferson , all three of whom found in such study a real source of enlightenment , can tell us a great deal about these three men and the age that each represented and helped bring to conscious <WSD>expression</WSD> . 
Meaning of the word marked with <WSD> tags:  the communication (in speech or writing) of your beliefs or opinions