“How can I prove that I am valuable?”

“To put it simply, many church leaders unknowingly replace the transcendent vitality of a life with God for the ego satisfaction they derive from a life for God. ”

Great Insignificance
 
Sometimes the people who fear insignificance the most are driven to accomplish the greatest things. As a result they are highly praised within Christian communities for their good works. This temporarily soothes their fear until the next goal can be achieved. But there is a dark side to this drivenness. Gordon MacDonald calls it “missionalism.” It is “the belief that the worth of one’s life is determined by the achievement of a grand objective.” He continues:
Missionalism starts slowly and gains a foothold in the leader's attitude. Before long the mission controls almost everything: time, relationships, health, spiritual depth, ethics, and convictions. In advanced stages, missionalism means doing whatever it takes to solve the problem. In its worst iteration, the end always justifies the means. The family goes; health is sacrificed; integrity is jeopardized; God-connection is limited.
 
http://www.outofur.com/archives/2011/07/has_mission_bec.html
 
(Thanks to Phoenix for the link
http://phoenixpreacher.net/)