For the Father did not call us to live an unclean life but a holy one.
The community receiving this epistle seemed to struggle with sexual immorality. Sha’ul reminds them that they are to live set apart lives, they should be different from those around them. If you wanted to apply this to your own life, you would have to examine the culture you are in to see where you need to take a stance to set yourself apart from your worldly peers. It may bring you ridicule and discomfort, but it is important to stay true to yourself and the work of Messiah by making yourself into a new creation.