Now that the quarterback has recovered from his injury, this week the team will be functioning 'at full strength' again. [=the team will have all its players again]
We are negotiating from a 'position of strength'. [=from a strong position; from a position that gives us an advantage]
He didn't mean to knock you down; he just 'doesn't know his own strength'. [=doesn't realize how strong he really is]
(..) Lord Commander, I'd like to join Lord Qhorin. Aye. Are you going to kill Joffrey? - If the Gods give me strength. - And then what? First we have to win the war. You never told me where you're from. (..)2012 TvShow: Game of Thrones Title: The Old Gods and the New Season: 2 Episode 6