'Serve' in the Bible

if, indeed, you are still firmly holding to faith as your foundation, without ever shifting from your hope that rests on the Good News that you have heard, which has been proclaimed in the whole creation under Heaven, and in which I Paul have been appointed to serve.

I have been appointed to serve the Church in the position of responsibility entrusted to me by God for your benefit, so that I may fully deliver God's Message--

These practices indeed have the appearance [that popularly passes as that] of wisdom in self-made religion and mock humility and severe treatment of the body (asceticism), but are of no value against sinful indulgence [because they do not honor God].

Knowing that of the Lord ye shall receive the reward of the inheritance: for ye serve the Lord Christ.