Galatians 3:2-3

2I would like to learn just one thing from you: Did you receive the Spirit by the works of the law, or by believing what you heard? 3Are you so foolish? After beginning by means of the Spirit, are you now trying to finish by means of the flesh? In contexts like this, the Greek word for flesh (sarx) refers to the sinful state of human beings, often presented as a power in opposition to the Spirit.