Concupiscence
Concupiscence is an ardent, usually sensual, longing. Involuntary sexual arousal is explored in the Confessions of Augustine, wherein he used the term "concupiscence" to refer to sinful lust. In Catholic theology, concupiscence is seen as a desire of the lower appetite contrary to reason.
There are nine occurrences of concupiscence in the Douay-Rheims Bible and three occurrences in the King James Bible. It is also one of the English translations of the Koine Greek epithumia, which occurs 38 times in the New Testament.
Jewish perspective
In Judaism, there is an early concept of yetzer hara. This concept is the inclination of humanity at creation to do evil or violate the will of God. The yetzer hara is not the product of original sin as in Christian theology, but the tendency of humanity to misuse the natural survival needs of the physical body. Therefore, the natural need of the body for food becomes gluttony, the command to procreate becomes sexual sin, the demands of the body for rest become sloth, and so on.In Judaism, the yetzer hara is a natural part of God's creation, and God provides guidelines and commands to help us master this tendency. This doctrine was clarified in the Sifre around 200–350 CE. In Jewish doctrine, it is possible for humanity to overcome the yetzer hara. Therefore, for the Jewish mindset, it is possible for humanity to choose good over evil, and it is the person's duty to choose good .
Augustine
Involuntary sexual arousal is explored in the Confessions of Augustine, wherein he used the term "concupiscence" to refer to sinful lust. He taught that Adam's sin is transmitted by concupiscence, or "hurtful desire", resulting in humanity becoming a massa damnata, with much enfeebled, though not destroyed, freedom of will. When Adam sinned, human nature was thenceforth transformed. Adam and Eve, via sexual reproduction, recreated human nature. Their descendants now live in sin, in the form of concupiscence, a term Augustine used in a metaphysical, not a psychological sense. Augustine insisted that concupiscence was not a being but a bad quality, the privation of good or a wound. He admitted that sexual concupiscence might have been present in the perfect human nature in paradise, and that only later it became disobedient to human will as a result of the first couple's disobedience to God's will in the original sin. In Augustine's view, all of humanity was really present in Adam when he sinned, and therefore all have sinned. Original sin, according to Augustine, consists of the guilt of Adam which all humans inherit.Pelagius
The main opposition came from a monk named Pelagius. His views became known as Pelagianism. Although the writings of Pelagius are no longer extant, the eight canons of the Council of Carthage provided corrections to the perceived errors of the early Pelagians. From these corrections, there is a strong similarity between Pelagians and their Jewish counterparts on the concepts of concupiscence. Pelagianism gives mankind the ability to choose between good and evil within their created nature. While rejecting concupiscence, and embracing a concept similar to the yetzer hara, these views rejected humanity's universal need for grace.Catholic teaching
The Catechism of the Catholic Church teaches that Adam and Eve were constituted in an original "state of holiness and justice", free from concupiscence. The preternatural state enjoyed by Adam and Eve afforded endowments with many prerogatives which, while pertaining to the natural order, were not due to human nature as such. Principal among these were a high degree of infused knowledge, bodily immortality and freedom from pain, and immunity from evil impulses or inclinations. In other words, the lower or animal nature in man was perfectly subject to the control of reason, and the will subject to God. Besides this, the Catholic Church teaches that our first parents were also endowed with sanctifying grace by which they were elevated to the supernatural order. By sinning, however, Adam lost this original "state", not only for himself but for all human beings.According to Catholic theology man has not lost his natural faculties: by the sin of Adam he has been deprived only of the Divine gifts to which his nature had no strict right: the complete mastery of his passions, exemption from death, sanctifying grace, and the vision of God in the next life. The Creator, whose gifts were not due to the human race, had the right to bestow them on such conditions as he wished and to make their conservation depend on the fidelity of the head of the family. A prince can confer a hereditary dignity on condition that the recipient remains loyal, and that, in case of his rebelling, this dignity shall be taken from him and in consequence from his descendants. It is not, however, intelligible that the prince, on account of a fault committed by a father, should order the hands and feet of all the descendants of the guilty man to be cut off immediately after their birth.
As a result of original sin, according to Catholics, human nature has not been totally corrupted ; rather, human nature has only been weakened and wounded, subject to ignorance, suffering, the domination of death, and the inclination to sin and evil. This inclination toward sin and evil is called "concupiscence". Baptism, CCC teaches, erases original sin and turns a man back towards God. The inclination toward sin and evil persists, however, and he must continue to struggle against concupiscence.
In this evolutionary era Catholic teaching on original sin focuses more on its results than on its origins. As Cardinal Ratzinger had intimated in 1981, and as Pope Benedict XVI clarified in 2008: "How did it happen? This remains obscure.... Evil remains mysterious. It is presented as such in great images, as it is in chapter 3 of Genesis, with that scene of the two trees, of the serpent, of sinful man: a great image that makes us guess but cannot explain what is itself illogical."
Catholic and Protestant differences
The primary difference between Catholic theology and most of the many different Protestant theologies on the issue of concupiscence is whether it can be classified as sin by its own nature. Different Protestant denominations tend to see concupiscence as sin itself, an act of the sinner. The Catholic Church teaches that while it is highly likely to cause sin, concupiscence is not sin itself. Rather, it is "the tinder for sin" which "cannot harm those who do not consent".This difference is intimately tied with the different traditions on original sin. Much Protestant theology holds that the original nature of humanity was an innate tendency to good; the special relationship Adam and Eve enjoyed with God was due not to some supernatural gift, but to their own natures. Hence, in some Protestant traditions, the Fall was not the destruction of a supernatural gift, leaving humanity's nature to work unimpeded, but rather the corruption of that nature itself. Since the present nature of humans is corrupted from their original nature, it follows that it is not good, but rather evil. Thus, in some Protestant traditions, concupiscence is evil in itself. The Thirty-nine Articles of the Church of England state that "the Apostle doth confess, that concupiscence and lust hath of itself the nature of sin".
By contrast, Catholicism, while also maintaining that humanity's original nature is good, teaches that even after this gift was lost after the Fall, human nature still cannot be called evil, because it remains a natural creation of God. Despite the fact that humans sin, Catholic theology teaches that human nature itself is not the cause of sin, although once it comes into contact with sin it may produce more sin.
The difference in views also extends to the relationship between concupiscence and original sin.
Another reason for the differing views of Catholics and certain Protestants on concupiscence is their position on sin in general. Certain Protestants hold that one can be guilty of sin even if it is not voluntary; The Catholic Church, by contrast, traditionally has held that one is guilty of sin only when the sin is voluntary. The Scholastics and magisterial reformers have different views on the issue of what is voluntary and what is not: the Catholic Scholastics considered the emotions of love, hate, like and dislike to be acts of will or choice, while the early Protestant reformers did not. By the Catholic position that one's attitudes are acts of will, sinful attitudes are voluntary. By the magisterial reformer view that these attitudes are involuntary, some sins are involuntary as well. Since human nature is not voluntarily chosen, the Catholic Church does not teach that it is sinful; some Protestants believe that, since some sins are involuntary, it can be.
Some Protestants believe that concupiscence is the primary type of sin; thus they might refer to it simply as sin, or, to distinguish it from particular sinful acts, as "humanity's sinful nature." Thus, concupiscence as a distinct term is more likely to be used by Catholics.