Bearing fruit...

   "And I am this day weak, though annointed king, and these men the sons of Zeruiah be too hard for me."  (2 Samuel 3:39) 
The Spirit of God wants to teach us that the believer who has received a position of authority from God soon loses the awareness of his dependence  because of the flesh which dwells in him.  As he exercises power he begins to have confidence in himself without realizing his need for the Lord's help, as he had back in the time when he wandered like a partridge hunted on the mountains.
Before the crown was on his head except on rare occasions he would inquire of God, not taking a single step without Him; but from the moment he receives the crown he forgets his safeguard.  He will again find this a little later after he has made bitter experiences, for we must remember that in David - and this one of the leading features of his character - discipline always bears admirable fruit.
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What is the fruit that we bear? Displaying the moral characteristics of the Lord Jesus Christ, being like Him.