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]
(..) What? Valuing life is not weakness. Hey. Look, if you're talking about what happened in the containment unit, I had everything under control. And disregarding it is not strength. I called his bluff, sweetheart, that's all. I knew he wouldn't have it in him to actually... Next time you gamble, (..)2004 The Incredibles