Christians Need Not Feel Compelled to Leave the State in Which They Were When They Were Called (7:17-24).
Paul now stresses that from a spiritual point of view Christians need not worry about their earthly state and position as it does not affect their spiritual position before God. From a spiritual point of view it is irrelevant. Neither having been married to an unbeliever nor being circumcised nor being uncircumcised nor being a slave affects them in God's eyes. He agrees that if a slave has the chance of freedom he should take it. But although it may be greatly to his physical benefit, it is not necessary for his spiritual benefit, because God sees all men as free.
This principle of remaining in the state in which they were before they were converted is echoed throughout the chapter. The point is that becoming a Christian need not change status in life, nor will current status put the Christian at a disadvantage as a Christian. What basically matters is the state of the heart towards God.