At of all places, Comicpalooza 2013, he was asked the kind of question you don't tend to get at a convention like Comicpalooza. This is his eloquent, touching, moving answer.
If you liked Patrick Stewart before, you will likely now admire him. If you were never a particular fan, you might be giving him a second thought.
This video was posted by the woman who asked the question. Stay to the end to see what she's wearing, which adds a heartfelt turn to it all.