The greatest unconsciousness of the greatest untruth, e.g.if, in the language of the Gospels (John), 'he who was blind' were to say 'I see,' is another aspect of the state of mind which Plato is describing.

The lie in the soul may be further compared with the sin against the Holy Ghost (Luke), allowing for the difference between Greek and Christian modes of speaking.

To this is opposed the lie in words, which is only such a deception as may occur in a play or poem, or allegory or figure of speech, or in any sort of accommodation,--which though useless to the gods may be useful to men in certain cases.

Socrates is here answering the question which he had himself raised about the propriety of deceiving a madman; and he is also contrasting the nature of God and man.

For God is Truth, but mankind can only be true by appearing sometimes to be partial, or false.