[21c]
Socrates
And likewise, if you had no memory you could not even remember that you ever did enjoy pleasure, and no recollection whatever of present pleasure could remain with you; if you had no true opinion you could not think you were enjoying pleasure at the time when you were enjoying it, and if you were without power of calculation you would not be able to calculate that you would enjoy it in the future; your life would not be that of a man, but of a mollusc or some other shell-fish like the oyster.