'Service' in the Bible

My imprisonment in [the cause of] Christ has become common knowledge throughout the whole praetorian (imperial) guard and to everyone else.

If, however, it is to be life here and I am to go on living, this will mean useful and productive service for me; so I do not know which to choose [if I am given that choice].

Yea, and if I be offered upon the sacrifice and service of your faith, I joy, and rejoice with you all.

Because for the work of Christ he was nigh unto death, not regarding his life, to supply your lack of service toward me.