I will not look with approval on anything that is vile. I hate what faithless people do; I will have no part in it. ~ Psalm 101:3
A life of purity must come with a desire to hate what is evil. However, be careful not to hate yourself if you fall prey to the temptation of lust. That is a trap - you are NOT evil!
When our heart changes, it motivate our behavior to turn away from what is evil and leave it behind. This is why an active, aggressive faith life is critical.
When tempted to lust - ask - how do I feel about what is happening in front of my eyes. Do I hate it or Do I love it?
GO DEEPER: 1 John 2: 12-17