When we look at Plato’s philosophical labors in the academy, we are struck with the different relations to public life which philosophy already assumes. Instead of carrying philosophy, like Socrates, into the streets and public places and making it there a subject of social conversation with any one who desired it, he lived and labored entirely withdrawn from the movements of the public, satisfied to influence the pupils who surrounded him. In precisely the measure in which philosophy becomes a system and the systematic form is seen to be essential, does it lose its popular character and begin to demand a scientific training, and to become a topic for the school, an esoteric affair. Yet such was the respect for the name of a philosopher, and especially for the name of Plato, that requests were made to him by different states to compose for them a book of laws, a work which in some instances it was said was actually performed. Attended by a retinue of devoted disciples, among whom were even women disguised as men, and receiving reiterated demonstrations of respect, he reached the age of eighty-one years, with his powers of mind unweakened to the latest moment. The close of his life seems to have been clouded by disturbances and divisions which arose in his school under the lead of Aristotle. Engaged in writing, or as others state it at a marriage feast, death came upon him as a gentle sleep, 348 B. C. His remains were buried in the Ceramicus, not far from the academy. II. THE INNER DEVELOPMENT OF THE PLATONIC PHILOSOPHY AND WRITINGS.—That the Platonic philosophy has a real development, that it should not be apprehended as a perfectly finished system to which the different writings stand related as constituent elements, but that these are rather steps of this inner development, as it were stages passed over in the philosophical journeyings of the philosopher—is a view of the highest importance for the true estimate of Plato’s literary labors. Plato’s philosophical and literary labors may be divided into three periods, which we can characterize in different ways. Looking at them in a chronological or biographical respect, we might call them respectively the periods of his years of discipline, of travel, of instruction, or if we view them in reference to the prevailing external influence under which they were formed, they might be termed the Socratic, Heraclitic-Eleatic, and the Pythagorean; or if we looked at the content alone, we might term them the Anti-Sophistic-Ethic, the Dialectic or mediating, and the systematic or constructive periods.