The quote means that Atticus is a great man who stands behind what he says and does, behaving the same in public as he does in his home. Unlike him, the others are two-faced, for example, publicly attacking Tom Robinson, while believing in the comfort of their homes that he might be innocent.
How can Alfred get in the ring with the contender.
Literature is generally used in English Language Teaching (ELT) for the development of knowledge about the language. It helps the learners to get familiar with the socio-political backgrounds of target language society and also makes them understand how communication takes place in a particular community.