Here we find Jesus answering questions from the Sadducees and now the Pharisees begin to challenge him, and they brought a lawyer! The Pharisees were a political and legalistic religious group that was part of the ruling class. They were arrogant and separated themselves from others, probably because of the pride they had through their showy obedience to all facets of traditions down to the minutest detail. They believed they were the only ones that could interpret the Law. Their religion was external rather than from the heart. Jesus summed up the law with his answer, which the Pharisees most likely did not understand due to their arrogance and legalistic mindset.
As Jesus stated, “All the Law and the Prophets hang on these two commandments.”