From The Christian Post:

By Dan Delzell, Christian Post Contributor

Whether you realize it or not, your life is controlled by one of two things: Your sinful nature, or the Holy Spirit. And in the case of the Holy Spirit, He is not a “thing,” but a Person.

Does your sinful nature still control you?

How can I know if something is a sin?

Got Questions states: There are two issues involved in this question, the things that the Bible specifically mentions and declares to be sin and those the Bible does not directly address. Scriptural lists of various sins include Proverbs 6:16-19, Galatians 5:19-21, and 1 Corinthians 6:9-10. There can be no doubt that these passages present the activities as sinful, things God does not approve of. Murder, adultery, lying, stealing, etc.—there is no doubt the Bible presents such things as sin. The more difficult issue is in determining what is sinful in areas that the Bible does not directly address. When the Bible does not cover a certain subject, we have some general principles in His Word to guide us. More Here

What is repentance? More Here