It is God’s will that you should be sanctified: that you should avoid sexual immorality; 1 Thessalonians 4:3
We are intended to be sanctified but what does that mean. It means to be like Christ and it is a process, it is something we work at every day and we do not do this on our own but with the help of the Holy Spirit. Let us praise God that we are justified (made right with God) through his work and he equips us to be sanctified (more like Christ).
For it is not those who hear the law who are righteous in God's sight, but it is those who obey the law who will be declared righteous.