The doctrine of Christian perfection has been at home in the works of theologians ever since the time of the early church. Yet, the doctrine has also created endless debate over the extent of sanctification in this life. The task of the theologian is to balance the commands of perfection found in Scripture with the reality of sin. Engaging with Scripture, and the works of Thomas Aquinas and John Wesley, I aim to present a nuanced approach to Christian perfection that affirms its attainability in this life, while rejecting the possibility of sinless perfection. My approach to Christian perfection holds important implications for the study of theological ethics. Many scholars are divided over whether ethics is based on happiness and virtue or obligation and moral law. The doctrine of Christian perfection unites both obligation and happiness together into one ethic based on Christ’s command of perfection and the happiness of union with God as one’s ultimate end.