But my horn shalt thou exalt like the horn of an unicorn; I shall be anointed with fresh oil. (Psalms 92:10)
The Lord wants spiritual leaders to be successful and to impact the world for the Kingdom of God. How can you be that kind of leader? Having knowledge of practical areas and the general tasks of leaders will help you become a successful leader. There are Biblical qualifications for leaders which are also necessary. Spiritual gifts, skills, education, and experience are important too.
To "anoint" means to dedicate or consecrate someone or something by applying oil. Oil is symbolic of the Holy Spirit.
The Spirit of the Lord is upon me, because He hath anointed me... (Luke 4:18)
Leprosy is a dreaded disease which slowly consumes the flesh of its victim. In Old Testament times a person with leprosy was called a leper. The leper was banned from his community because the disease was contagious. To keep others from coming in contact with him he was required to cry out "unclean" wherever he went. Leprosy would slowly eat away his physical body and he would die a painful death.
So he [David's father] sent and brought him [David] in. Now he was ruddy and withal of a beautiful countenance, and goodly to look to. And the Lord said, Arise, anoint him; for this is he. Then Samuel took the horn of oil and anointed him in the midst of his brothers; and the Spirit of the Lord came mightily upon David from that day forward. (I Samuel 16:12-13)
And He gave some apostles; and some prophets; and some evangelists; and some, pastors, and teachers. (Ephesians 4:10)