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]
(..) Now! How much longer, Shuri? I've barely begun, brother. You might want to pick up the pace. Allfathers, give me strength. You understand, boy? You're about to take the full force of a star. It'll kill you. Only if I die. (..)2018 Avengers: Infinity War
(..) are we talkin' about here? The Thanos-killing kind. Don't you think that we should all have a weapon like that? No. You simply lack the strength to wield them. Your bodies would crumble as your minds collapsed into madness. Is it weird that I wanna do it even more now? (..)2018 Avengers: Infinity War