The key is knowing your identity in Christ. In 2 Corinthians 5:17, it says, "Therefore, if anyone is in Christ, he is a new creation; the old has gone, the new has come."

"Do not conform any longer to the pattern of this world, but be transformed by the renewing of your mind. Then you will be able to test and approve what God's will is. His good, pleasing and perfect will." Romans 12:2

"Wherefore seeing we also are compassed about with so great a cloud of witnesses, let us lay aside every weight, and the sin which doth so easily beset us, and let us run with patience the race that is set before us," Hebrews 12:1