We would fain grow notable by doing, it suits our legal spirit; but we can only grow valiant and succesful by believing. When salvation-work is taken on ourselves, it rests on an arm of flesh, and a withered arm, which must fail; but when we wrestle by believing, the arm of Jesus is engaged to fight the battle, and He will and must bring victory, else His word and faithfulness would fail.

Samuel Rutherford