What are the sinful passions, after all?
They are sins, e.g. acts of disobedience against God, many times repeated! This is how we gradually let something become a bad habitude, a bad habit, and then we commit any particular sin very easily. We then acquire, as we say, the passion that is connected with this sin (hence the expression: sinful passion).
For example, if we do not control the way we eat, both in terms of quantity and quality, in other words, if we have no self-discipline and do not abstain either from eating more or from eating a necessarily tasty food, we gradually either acquire the passion of gluttony and become gluttonous (a belly-worshiper) or we acquire the passion of lickerishness and become worshipers of the palate, or even both. Consequently, these two sinful passions have been grown inside us, because we did not control this particular sin right from the start. In other words, we did not give in only once, but twice, thrice etc. and, finally, we became a belly-worshiper, gluttonous, lickerish.