Socrates

Created, utilized, and arguably perfected the Socratic method used in his famous dialogues solely for the purpose of seeking an answer to the classic question " what am I to do?  What is the purpose of life." He seeked not only a truthful answer from himself,  but of many of those he encountered so that he may compare the definition of life.  The knowledge gained from answering the ancient inquiry is a form of knowledge higher than that of the technical world of math, science, and false values that we were born into.  Having lived in this world of corruption and individual mindsets presses upon us unknowningly, we have lost sight of the critical and essential, selfless and pious goal of life,  and in the meantime seem to not care enough about the subject to ponder the meaning of life more than a few moments a day, if that.  Socrates is the only one who has expertise of the superior knowledge , which would explain his dedication for universal  enlightenment