Remove sources of sin. In terms of watching television this means strict control by way of selective viewing. American and Australian TV is so dominated by adverts and what is puerile that it is virtually useless. Now with channel five in the UK the trend is in that direction. There has been a steady increase in blasphemy, mockery of what is right, crude language, sexual perversity, corruption, violence and crime.
Mortification is an essential part of progressive sanctification.
It is the negative but a necessity. The positive side of progressive sanctification is conformity to Christ and it is this positive work which takes up most of our time. The redeemed are described in revelation in a two-fold way. They did not defile themselves with sin and kept themselves pure. But these are the ones who enjoy the company and the activities of the Lamb in the New Jerusalem and on the new earth and in the new heavens.