PLATO: Republic, especially Book VII. Translations by Jowett and Vaughan. Theaetetus, 172 ff. Translation by Jowett.
ARISTOTLE: Ethics, Book X. Translation by Welldon.
MARCUS AURELIUS: Thoughts. Translation by Long.
EPICTETUS: Discourses. Translation by Long.
BACON: The Advancement of Learning.
EMERSON: Representative Men--Plato; or the Philosopher. Conduct of Life--Culture. Essays, Second Series--Experience.
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ROYCE, JOSIAH: Spirit of Modern Philosophy. Introduction.
HIBBEN, J. G.: Problems of Philosophy. Introduction.
The Approach to Philosophy · The Wunder Library — complete classics, free to read, with narration.