So Jesus died for all our sins past, present and future. Therefore there can be no law against anything any more if it is all forgiven.
23 All things are lawful for me, but not all things are helpful; all things are lawful for me, but not all things edify.
1 Corinthians 10:23
But then why not go out and sin? Because God knows that the response of a believing heart to the revelation of Jesus’ death is gratefulness and a desire to please Him (1 John 4:19). Paul says we died to sin when Jesus died (Romans 6:1-11). The revelation that God sent His Son to die for us works in our hearts automatically and we want to do what pleases Him (Romans 7:23). We are wed to Him in a way and forever spoilt for anything else.
However in some ways we haven’t changed. The old nature still wants to do the wrong thing (Romans 7:14-25). So the answer is to offer ourselves, our every member, to God as a love slave to Him (Romans 12:1-2). Then He will show us what to do and He will work within us to will and to do according to His good pleasure (Philippians 2:12).