1 Corinthians 6:19b-20 You are not your own; you were bought at a price. Therefore, honor God with your body.
Paul the apostle rebuked the believers in Corinth because some of them practiced in getting involved in sexual immorality. Keep in mind that this people in Corinth were Christians but they participated with these kind of sins. That is why Paul reminded them and bring to their attention that their bodies belong to God, because Jesus paid the penalty of your sins (He paid it all) He saves us and redeemed us!
So, we need to respect God with our earthly body. How? By not abusing our body with too much liquor, smoking cigarettes, using drugs and sex outside marriage. We must avoid these sins and honor Jesus with our body!