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]
(..) he had become... all dry, all white. Tears streamed from his eyes. He couldn't hold them back. He didn't even have the strength to sleep. And all that time, the princess watched him. At long last, it was the th night... and the soldier stood up, (..)1988 Cinema Paradiso