'Strength' in the Bible

Yet it was I who destroyed the Amorites in front of them, though their height seemed like a cedar, though their strength seemed like an oak, but whose fruit I destroyed from above and the roots from beneath.

Escape will fail the swift,the strong one will not prevail by his strength,and the brave will not save his life.

Therefore thus saith the Lord GOD; An adversary there shall be even round about the land; and he shall bring down thy strength from thee, and thy palaces shall be spoiled.

Ye which rejoice in a thing of nought, which say, Have we not taken to us horns by our own strength?