We must remember that the attempts to ascertain the virtues and to achieve justice have an end in view: the achievement of the good and happy life. In attempting to analyze what we may call the "parts" of or the "particulars" of the mind (or what he calls also the soul), Plato is here interested in pursuing something that he finds to be inherent, or intrinsic, or "born to" every human being. In his use of the terms "mind" and "soul," Plato shows himself to be in the same state of philosophical flux that we noticed earlier in his use of "the gods" and "God." At this stage of his thinking, Plato is unsure of himself; he is, after all, a human being dealing with very intricate philosophical problems.
In his arguing from generalities to particulars, or from particulars to generalities, Plato is seeking to demonstrate philosophical premises and proofs that follow logically. In fact, Plato is attempting to explain how he is presenting proofs in his explanation of his use of "relative" terms and "qualifications" of terms just before he discusses the myth of Leontius at the place of execution.
