To know, is to know that you know nothing. That is the meaning of true knowledge.
Socrates is right in both quotes. A life isn't worth living when you don't examine it and make it the best it can be. And while ignorance is NOT bliss, there will always be more to know.
We are given an opportunity here, even if we are prisoners in a land and time that is not our own. This is a chance to learn new things, to learn about ourselves and to make our life here the best it can be.
And at least, in here, the Dark Lord does not exist, hasn't taken over Britain, and isn't torturing and killing anyone.
At least here a girl lacking her family can find her dead uncle alive.
At least here I don't have to hide being in love to save myself and my boyfriend from torture.