'Sake' in the Bible

(For we do not proclaim ourselves, but we proclaim Christ Jesus as Lord, and ourselves as your bondservants for the sake of Jesus.)

For we, alive though we are, are continually surrendering ourselves to death for the sake of Jesus, so that in this mortal nature of ours it may also be clearly shown that Jesus lives.

In fact I take pleasure in infirmities, in the bearing of insults, in distress, in persecutions, in grievous difficulties--for Christ's sake; for when I am weak, then I am strong.