Did you understand he is saying he (paul) needs to suffer more to be as filled with suffering as Christ was
Yes. And I’m wondering what is the role of suffering in a theology of faith alone, where faith is understood as an act of the mind (or the mind and the heart) but not of the body.
Googling suffering and Martin Luther I found the following:
http://www.crownofcompassion.org/2014/01/06/martin-luther-on-suffering/
Martin Luther on suffering
January 6, 2014 by Dave Henning Leave a Comment
Timothy Keller discusses Martin Luthers view of suffering in Chapter 2 (The Victory of Christianity) of Walking with God through Pain and Suffering. Pastor Keller states that for Luther, suffering played a dual role. Suffering must first empty us of our pride, leading us to find our true joy and sole security in Jesus. This joy and love, in turn, enables us to face and overcome suffering, as Luther once explained:
It is Gods nature to make something out of nothing; hence one who is not yet nothing, out of him God cannot make anything, . . . therefore God accepts only the forsaken, cures only the sick, gives sight only to the blind, restores life only to the dead, sanctifies only the sinners, gives wisdom only to the unwise. In short, He has mercy only on those who are wretched.
Yet Pastor Keller emphasizes that suffering does not automatically produce growth. We must first understand Christs suffering and work on our behalf. We cannot be imitators of Christ, exhibiting His love and patience under pressure, until we fully embrace Christs suffering for us. Patience will not earn us peace with Christ. Rather, we need Christs peace in order to be patient.