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]
(..) Vegas. Where were you? And why are you so red? Honey, it's a long story. We are gathered here today because of the strength of love and the promises... All I know is, I am so sorry. And I promise for as long as we're married... I'll never, ever put you through anything like this again. (..)2009 The Hangover