188. A change in the object makes venial sin mortal: (a) when that which is light matter objectively is apprehended subjectively as grave matter (e.g., a person tells a small lie or commits a trifling theft, thinking these to be mortal sins); (b) when that which is light matter by itself becomes knowingly grave matter through the additions that are made to it (e.g., a thief steals small amounts frequently with the intention of having a great amount of ill-gotten money after a time). 189. It should be noted that, while the matter of venial sins may coalesce so as to form grave matter and constitute a mortal sin, as just explained, venial sins themselves do not, from mere multiplication, ever become mortal, since the difference between mortal and venial sin is not one of quantity, but of kind. Hence, when acts are slightly sinful but do not coalesce, they multiply venial sins, but do not form mortal sin. Example: Coming a few minutes late for Mass every Sunday. 190. The multiplication of venial sins, especially when they are held as of no importance, disposes for the commission of mortal sin: (a) directly, by forming a habit that calls for ever greater indulgence (e.g., petty thefts lead to dishonesty on a large scale); (b) indirectly, by familiarizing one with wrongdoing and chilling the love for virtue. 191. The wrong purpose of the agent makes an act that is only venially sinful (as far as the object is concerned) to become mortally sinful, when the purpose contains a grave malice in itself, for the act is then intended only as a means to what is seriously wrong (see above 80). Example: To tell a small lie in order to break up friendships and sow hatreds. 192. The circumstances of an act that is only venially sinful in itself also make the act mortally sinful, when there is grave malice in such circumstances. Cases of this kind are the following: (a) The circumstance of the person committing the sin sometimes changes the malice from light to grave. Example: Unbecoming levity in one in authority may cause serious disrespect for his office and thus be gravely sinful; (b) The circumstance of the manner in which an act is performed may change it from a venial to a mortal sin, as when the sin is committed out of contempt, or is so coveted that it would be preferred to a grave obligation. Examples: One who violates a law of lesser moment, not because he regards it as bad, but because he wishes to show his disregard of all law and authority; or one who is so attached to games of chance that he is prepared to steal a large sum rather than give them up.