A thought can be happy, pleasant, sad, or depressing. It also can be tempting, the kind of thought that will cause you to question its origin.
As tempting thoughts bear down on us, we may find ourselves surrendering to them and falling into sin. Whether it is for just a moment or for months, tempting thoughts have a way of breaking down our resistance and causing us to rationalize away the action.
Everyone is subject to these tempting thoughts, both Christians and non-Christians. However, as Christians we can prevent these thoughts from lingering in our minds by knowing our position in Christ.
So, what is your position in Christ? If you are a Christian, Christ lives in you, and you are in Him. And if He is in you, then you should honor Him by doing what Paul urges in verse 2: "Set your mind on the things above, not on the things that are on the earth."
If you continue to think like you did before you came to know the Lord, you will never reach the full potential God has for you in this life. Tempting thoughts will come your way. This is not a sin. But dwelling on these thoughts only breeds sin.
Remember, every action you take begins with a thought in your mind. "For as he thinks within himself, so he is" (Proverbs 23:7).