But each one is tempted when he is carried away and enticed by his own lust. Then when lust has conceived, it gives birth to sin; and when sin is accomplished, it brings forth death. James 1:14-15 (NASB)
If you are intending to change biblically, it is crucial that you understand the role sin plays in your life, and its effect on every relationship you have. I have observed that many Christians tend to view their sinful thoughts, actions, and desires too casually. They don't look at their sin for what it is in God's eyes; rebellious and heinous and contrary to the sovereign authority and majesty of God.
The above verse reveals the "why" we love to sin; because the heart is full of lusts that demand to be satisfied at any cost. Sadly, for many of us, this is normal operating procedure.
Part of the problem of our post modern church age is that the wrong things we do are dumbed down for the masses who do not want their conscience pricked by truth. For example, the common to man behaviors such as anger and swearing are labeled as "mistakes" or "goof ups" instead of sins. Where is the accountability for sin when it is not even called sin? Do you see how sin has been excused away? The disease model theory has brought quite a bit of harm to the church as we have stopped calling much of what is sin by it's rightful name.
Many churches no longer even preach about sin due to fear of man and the whole church growth movement. Since an abundance of churches now follow the non-judgmental philosophy of the world there is less confrontation of sin in the church. As a result, people are not being challenged to holy living. There is little address to ungodly thinking, and even less understanding of the sinful heart of mankind. More churches than I can count do not practice Matthew 18 for the purpose of restoration of a repentant sinner, because sin is not mentioned!!
The Holy Spirit is absent from such churches as no one is really interested in change to glorify God, but most are interested in change that will make them feel better about how they are living and sinning.
The sin issues of church goers are compounded as every attempt is made to gloss over them and claims go forth in how God's grace is enough to cover their "mistake." The church is truly becoming more like the world than the spotless Bride of Christ. How much worse for us as partakers of God's abundant grace, those who are one with Christ to take part in such casual excusing of sin! Do we realize that we are flaunting God's grace?
In God's eyes, there are no minor sins. I believe God takes all very seriously for Christ paid for each one of them with His blood on the cross.
We are supposed to belong to God and have allegiance to Him and His mission for mankind. When we willingly and wantonly sin, we are actively being traitors to our first love. Choosing our own way and putting our own will ahead of God's good will for us is idolatry. We are selling out our God who deserves our loyalty, for our own self-worship.
Instead, let us walk in the Spirit so that we do not indulge the lusts of the flesh.
You adulteresses, do you not know that friendship with the world is hostility toward God? Therefore whoever wishes to be a friend of the world makes himself an enemy of God. Or do you think that the Scripture speaks to no purpose: “He jealously desires the Spirit which He has made to dwell in us”? But He gives a greater grace. Therefore it says, “GOD IS OPPOSED TO THE PROUD, BUT GIVES GRACE TO THE HUMBLE.” Submit therefore to God. Resist the devil and he will flee from you. Draw near to God and He will draw near to you. Cleanse your hands, you sinners; and purify your hearts, you double-minded. Be miserable and mourn and weep; let your laughter be turned into mourning and your joy to gloom. James 4:4-9 (NASB)