'Slave' in the Bible

Everything is permissible for me, but not all things are beneficial. Everything is permissible for me, but I will not be enslaved by anything [and brought under its power, allowing it to control me].

If, however, the unbeliever is determined to leave, let him or her do so. Under such circumstances the Christian man or woman is no slave; God has called us to live lives of peace.

Were you called while a slave? It should not be a concern to you. But if you can become free, by all means take the opportunity.

For he who is called by the Lord as a slave is the Lord’s freedman. Likewise he who is called as a free man is Christ’s slave.

Although I am a free man and not anyone’s slave, I have made myself a slave to everyone, in order to win more people.

but I discipline my body and make it my slave, so that, after I have preached to others, I myself will not be disqualified.