In his book Prophecy and Discernment R W L Moberly describes in unmistakably kenotic terms the nature and practice of Christian existence.
Because his message is "Jesus Christ is Lord", its corollary is that Paul's role entails not mastery over others, but rather service of them…to proclaim the lordship of Christ entails a revaluation of human priorities in the way of Christ, the renunication of self-will and self-aggrandizement and the embrace of self-emptying and self-giving for the welfare of others. This is not only possible for Paul because he has "seen the light" – the light of God's glory revealed in the person of Jesus; it is this knowledge of God that determines Paul's priorities.
Quoted in New Perspectives for Evangelical Theology.Engaging with God, Scripture and the World, Ed. Tom Greggs, London, Routledge, 2010.
My feeling is still that much breast beating rhetoric about servant leadership never quite engages with those other psychological drives more satisfied by being the leader, and more emotionally content with discourse of authority, envisioning, initiating and the other euphemisms for having a sense of power. I'm not against power – it exists and has to be managed. But the questions will always be – who has power – how is power exercised – what quailifies, constrains, governs power? And in Jesus' case it was love. So when leadership is discussed, described, embodied, let's use the discourse of love for others rather than the discourse of authority over others. Hmmph!