So Samuel took the horn of oil and anointed him in the presence of his brothers, and from that day on the Spirit of the LORD came upon David in power (1Samuel 16:13).
Has the Spirit of the Lord rested upon your life? Can you cite the time when God's Spirit began demonstrating his power through you?
David knew the day the Spirit of the Lord began a special work in him. That Spirit was different from most leaders. Instead of seeking power and control, he led in response to a need. Instead of being a perfect person, he learned from mistakes and acknowledged them among those he led. Instead of placing confidence in his own abilities, he sought wisdom from the only real commander in charge. David never lost a battle through his many years of leading Israel. He failed God by sinning with Bathsheba and by numbering the troops. He learned from those failures, and he had to pay a price for them. However, the Spirit of God never left David. It never left because of his willingness to keep a soft heart toward God even when he failed.
God wants to do the same in you and me, but He will not allow that Spirit to rest upon us if we seek to control outcomes and manipulate out of our need for power. A servant leader knows that we are only a tool in the Master's hand. We do not value ourselves more than we ought. David's heart was fully the Lord's. Is your heart fully the Lord's to do with what He wills?