Read Phaedo by Plato here, or find it in Volume 2 of your Harvard Classics

As we consider that Socrates was likely used by God to help prepare the hearts of the Greeks for Christ, find as many parallels between the teachings of Christ and the teachings of Socrates that you can. Refer both to Crito and Phaedo in your search. 

What are the main arguments in the Phaedo?

What are the main philosophical concepts we have learned so far in the Republic, Crito, and Phaedo?