Recollection, Affinity, and the Objections of Simmias and Cebes

Cebes added: Your favorite doctrine, Socrates, that knowledge is simply recollection, if true, also necessarily implies a previous time in which we have learned that which we now recollect. But this would be impossible unless our soul had been in some place before existing in the form of man; here then is another proof of the soul's immortality.

But tell me, Cebes, said Simmias, interposing, what arguments are urged in favour of this doctrine of recollection. I am not very sure at the moment that I remember them.