At times problems would be assigned on an individual basis. He continued to teach until the end, winning the admiration and love of his students and fellow Athenians. Plato is considered to be one of the most important philosophers of all time. His educational and philosophical theories continue to influence countless thousands. Whitehead, commenting on Plato's contribution to philosophy, said that every philosophy after Plato is but a footnote to Platonic thought.
Ultimate reality is spiritual in nature.
Plato explains in the Timaeus the necessity of postulating a prior idea or form for every material object. For example, the idea of a house must exist before the material shape can take place. Where any house exists, it conforms to the general idea of house. The Nature and Destiny of Man. Man has an individual soul chained to a material body.