One of the three direct ways to sin in the flesh, speaks about the sinful Adamic nature of the fallen man.
Galatians 5:17 talks about the flesh lusting against the Spirit. We must be very careful not to yield to the desires of the flesh just as Apostle Paul warned in Galatians 5:16, knowing fully well that the flesh would naturally want to behave sinfully.
Like Apostle Paul, we too can be victorious over the wrong influence of the flesh by accepting the Lord Jesus as Lord and committing to live our lives to His pleasure. Our yearly New Year resolutions to live a good life can not help in this regard.
It is only through the help of the Holy Spirit can anyone overcome the flesh. As we cry out to the Almighty God for help to live for according to His will, bringing our flesh into subjection, the Holy Ghost will help us and we also would be able to say, like Apostle Paul that we have fought a good fight.