Since we have confidence to enter the holy places by the blood of Jesus, by the new and living way that He opened for us through the curtain, that is, through His flesh, and since we have a great priest over the house of God, let us draw near with a true heart in full assurance of faith, with our hearts sprinkled clean from an evil conscience and our bodies washed with pure water (Hebrews 10:19-22). God has provided for us every word we need to help us think on pure things. We need to live by every word that comes out of the mouth of God, to be able to live pure, and think pure thoughts. We cannot partake in worldly activities and expect to live a pure life. If you feed on the things of the world, what it has to offer and ignore the things of God, naturally your thoughts will draw towards what you feed it with.
Many times people say they have a problem with lust, but what they indulge in is the very thing that causes them to sin. If we get in the habit of feeding on pure food, we will grow pure, but if we refuse to feed on pure things, and engage in the dirt, we will get dirty. The word of God is pure, so if we remain in it, it will purify us. Then we will be able to think pure things, and live pure, as our Father in heaven is pure. Whatever you expose yourself and thoughts to, that is what you are. Get saturated in the word of God, and you will be pure, holy, peaceful, clean and you will be blessed forever.
Finally, whatever is true, whatever is honorable, whatever is just, whatever is pure, whatever is lovely, whatever is commendable, if there is any excellence, if there is anything worthy of praise, think about these things (Philippians 4:8). As you think on these things, walk worthy of the God who called you from darkness, into His ,malveolus light. God bless you.