Consider how diverse and unpromising were the human materials that God chose for the fulfilment of his purposes. Cf. Deut. /:7, 8; 9:4, 5. One secret of how God could do this is described in verses 24, 25a. Is this a secret of victory that you have learnt for yourself? Cf. phil. 4:13; 2 Cor. 12:9.
Consider especially Reuben, Judah and Joseph. In whom was the promise of verse 10 fulfilled? (See mg. for sense; cf. Ezek. 21:27.) Cf. also 1 Chr. 5:1, 2.