It is a matter of moral integrity. Ultimately I cannot convince you anything...however, I believe no one is beyond personal redemption.

[Spock tilts his head in curiosity...]

...We cannot be completely sure of that. The brain works in fascinating ways and will always leave impressions... your very moral fiber could change as a result. [For the 'better' went without saying...
And what Spock did not say was his speculations on memories that he had discussed with Mister Skywalker....there was always hope.]