I just read all of his tweets since his arrest. He seemed extremely wise and intelligent to me and at terms with being at the end of his life.

One that stands out to me:

Do you know yourself? Not your profession, skills, likes, dislikes, appearance. These are not you. I mean the Thinker. The one who acts, feels, observes and experiences within you. If you do not know this Thinker, then your thoughts are the thoughts of a stranger.