Trips to the beach keep me 'sane'. [=keep me feeling happy and able to deal with life without becoming too upset, nervous, etc.]
It's hard to stay/remain 'sane' [=to stay relaxed, calm, etc.] when I'm so busy.
He is perfectly 'sane'. [=he is not mentally ill]
(..) trust a queen who can't keep her promises? Whomever Ser Jorah was when he started informing on you, he is no longer that man. I can't remember ever seeing a sane man as devoted to anything as he is to serving you. And yet he did betray you. Did he have an opportunity (..)2015 TvShow: Game of Thrones Title: Hardhome Season: 5 Episode 8