Good question! For all you bible readers out there, you probably already know that the answer can be found right there in Philippians 4 v 8. Now some Christians may think this scripture is too hard to obey and to think on good things is just too hard to do. Well, I suppose it depends who you are living for. It depends if you are living to please God, or please yourself. It depends if you are living for the glory of God, or for your flesh. When our minds are in submission to Christ and we are focusing on those things above as we are told to do, it will not be so hard. But of course, no matter how spiritually mature a Christian is, we all need the constant help of the Holy Spirit to renew our minds and help us keep our minds on things that are pleasing to God. The world is full of distractions and it is not easy, but it is not impossible. Would God tell us to do something we cannot do? Be encouraged. All you need is your faith in Jesus Christ and your trust that the Holy Spirit will assist you in renewing your mind. Ask God to give you His desires. Ask God to let you love what He loves and hate what He hates. Among the things God hates are pride,( a high look) racism, and partiality. The renewing of our minds may not be easy, but as Christians we need to remember this. The things that are really worth having in our lives, do not usually come to us easily. That includes a renewed mind and a clean mind. But everyone can be sure of this. Anyone who makes an effort to renew and clean their mind and endevours to meditate on or think thoughts that are pleasing to God, will be greatly rewarded by Him.Finally, brethren, whatsoever things are true, whatsoever things are honest, whatsoever things are just, whatsoever things are pure, whatsoever things are lovely, whatsoever things are of good report; if there be any virtue, and if there be any praise, think on these things.
(Phillippians 4 v 8)