Socrates is one of the philosophers    1    influence has been the greatest. He was a great doubter who believed that we should question everything. While the earlier thinkers tried to explain the universe, he didn’t believe that this was     2    (particular) useful. He taught that it was our    3    (behave) and the way we lived that are important. We should think for    4    (we) and be rude to our ideas and beliefs.     5    the end, he was tried and sentenced to death in 399 BC.