I will set no worthless thing before my eyes – ouch. None of us ever do that. You do not even have to think about porn here, there is more worthlessness per square inch in our culture that we can possibly count. What was the old phrase GIGO? Garbage in, garbage out.
I hate the work of those who fall away – this one is a bit more difficult. We have to know that they have fallen away. There are myriads of teachers and writers who have fallen in the faith or else teach abhorrent doctrine. Do we know the Bible well enough to recognize false teaching when we encounter it? Do we hate it? Or do we admire the “success” of the false teacher? Do we let that teaching, their work grip us?
A perverse heart shall depart from me – this could be twofold. First, we disassociate from those with a perverse heart. And/or we stand against perversion in our own heart.
There is much here. The standard is high. I do not know about you but my prayer is for God to empower me to live like this.