v1: Who gets to live with the Lord, both now and forever?
v2: Christians need to live lives of doing the right thing and perform specific acts that are the right thing. The way to obey these two commandments is to have a love of God's truth.
v3: Don't talk about people behind their back and don't commit any evil against your neighbour, which means everyone, according to the parable of the good Samaritan. Don't get all bent out of shape over something that was done to someone else to the degree that it is as if they had done it to you. In other words, don't spend an inordinate amount of time dwelling on wrongs done to others. I think soul ties might come into play here.
v4: We should despise the vile in their current state but also see, with the eyes of the Lord, who they could be if they came to Acts 2 38 salvation. We shouldn't want to be like the vile, but we should rather look up to and whish to be like people who are further along in their walk with God than us.
Also, if a Christian makes a commitment to someone or something, then a better thing comes along, the Christian should honour the first commitment they made.
v5: I really don't think interest is a good idea.
Followers of Christ shouldn't move up in the world at the expense of innocent people getting hurt.
Of course, the only way believers can obey these things and never stop doing so is by the Lord working within them.