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]
(..) All of the good we did... it doesn't matter. What does matter is that to them, justice was done. See, a just world... is a sane world. There was nothing sane about Chernobyl. ♪ (EERIE MUSIC PLAYS) ♪ BORIS SHCHERBINA: I'm pleased to report (..)2019 TvShow: Game of Thrones Title: Winterfell Season: 8 Episode 1