“A good intention is not itself sufficient, but a correct choice of actions is also needed.” Pope John Paul II, Veritatis Splendor
It is a common error in moral theology to claim that an act cannot be intrinsically evil because the person does not intend evil. However, the Magisterium definitively teaches that to be moral all three fonts of morality must be good:
- intention
- moral object
- circumstances
The deliberate choice of an act that is – by the very nature of the act, independent of intention or circumstances – ordered toward an evil proximate end is always objectively a sin. Such acts are intrinsically evil. The morality of an intrinsically evil act is not determined by intention or circumstances, but by the moral object of the chosen act.
Catechism of the Catholic Church: “It is therefore an error to judge the morality of human acts by considering only the intention that inspires them or the circumstances (environment, social pressure, duress or emergency, etc.) which supply their context. There are acts which, in and of themselves, independently of circumstances and intentions, are always gravely illicit by reason of their object; such as blasphemy and perjury, murder and adultery. One may not do evil so that good may result from it.” (CCC, n. 1756)
For example:
Euthanasia is essentially murder (the direct and voluntary killing of an innocent human being) with the intention of eliminating all suffering. The intention is good, but the chosen act is intrinsically evil. The good intention in euthanasia does not cause the act to become no longer intrinsically evil.
The same is true for all intrinsically evil acts. A good intention does not justify genocide, or torture, or racism, or slavery, or perjury, or blasphemy, or adultery. Neither does a good intention justify the popular sins of the present age, such as contraception or various sexual sins.
The argument that people use to try to justify contraception, by saying that the intention, the purpose or reason for choosing the act, is good, is not a valid argument. If this approach did in fact cause the intrinsically evil act of using contraception to become no longer evil, then the approach would work for other types of intrinsically evil acts. It does not.