Don't allow yourself to live in sin. Jesus Christ set us free so that we don't have to obey the sinful nature. Although we are not perfect and mess up sometimes, and God always forgives through Jesus, we are not meant to be under the power of sin any longer. "For when we died with Christ we were set free from the power of sin." (Romans 6:7); "And because you belong to Him, the power of the life-giving Spirit has freed you from the power of sin that leads to death." (Romans 8:2); "Christ has freed us so that we may enjoy the benefits of freedom. Therefore, be firm in this freedom, and don’t become slaves again." (Galatians 5:21); "And those who belong to Christ Jesus have crucified the flesh (sinful nature) with its passions and desires. If we live by the Spirit, let us also be guided by the Spirit." (Galatians 5:24-25)