Final answer:
Venial sins should not be taken lightly because they can lead to more serious sins and desensitize individuals to wrongdoing. As reasoned beings, it is our moral duty to maintain vigilance against even minor transgressions, acting as an example for others.
Step-by-step explanation:
Venial sins should not be treated lightly because they can be a gateway to more serious sins. Just as small habits can build up into stronger, uncontrollable forces, trivializing venial sins may foster an environment where one becomes desensitized to sinning, thereby increasing the likelihood of committing graver sins. Moreover, as beings with the capacity for reason and the recognition of good and evil, it is our duty to pay attention and not remain indifferent to these lesser offenses. This vigilance is important because actions, whether good or evil, tend to grow stronger over time. Treating venial sins with seriousness is akin to being a "citty upon a hill", where our actions are visible to others and can set an example. If we treat venial sins with indifference, we risk leading others astray and damaging our own moral integrity. Thus, it is crucial not only for our spiritual well-being but also for the example we set for society.