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]
(..) of your brothers when you witness them having knowledge of your mother. I have another true thing to tell you, Unferth Kin-Slayer. If your strength and heart was as strong and fierce as your words, Grendel would not feel free to murder and gorge on your people, without fear of retaliation. (..)2007 Beowulf
(..) to stay in the hall all night. I find it difficult to argue with a drunk. But it's true, I did not win the race... We swam for five days, neck and neck. I was conserving my strength, for the final stretch. When this storm blew up, and with it came sea monsters. Again and again dark things (..)2007 Beowulf