883. Non-religious communication is sinful as follows: (a) It is sinful according to natural law, when in a particular case it would be a proximate danger of perversion freely chosen, or an involuntary danger against which one does not employ sufficient precaution. Examples: Titus chooses infidels and freethinkers for his friends and intimates, understanding their character and bad influence. Balba on account of her poverty is obliged to work in a place where all her companions are unbelievers who scoff at religion and try in every way to win her over to their errors; yet she is not concerned to arm herself more strongly in faith. (b) According to ecclesiastical law, civil communication is forbidden with those who have been excommunicated as persons to be avoided (Canon 2267). Such persons are those who lay violent hands on the Roman Pontiff (Canon 2343), or who have been excommunicated by individual name and as persons to be avoided through public decree or sentence of the Apostolic See (Canon 2258). Exception is made, however, for husband and wife, children, servants, subjects, and for others in case of necessity. 884. Religious communication is sinful on account of danger in the following cases: (a) If it is a proximate and voluntary occasion of sin against faith. Examples: Sempronius goes to a non-Catholic church to hear a minister who attacks the divinity of Christ and other articles of the Creed. The purpose of Sempronius is to benefit himself as a public speaker, but he knows that his faith suffers, because he admires the orator. Balbus chooses to listen over the radio to attacks on religion and Christianity, which cause serious temptations to him. (b) If it is a necessary occasion of sin and one does not employ sufficient precautions against it, religious communication becomes sinful. Example: Titus, a prisoner, has to listen at times to a jail chaplain, who teaches that there are errors in the Bible, that man evolved from the ape, etc. Titus feels himself drawn sympathetically to these teachings, but makes no effort to strengthen his faith.