Many who confess their venial sins out of custom and concern for order but without thought of amendment remain burdened with them for their whole life and thus lose many spiritual benefits and advantages.
Strive to attain to the greater virtues, but do not neglect the lesser ones. Do not make light of a fall even if it be the most venial of faults; rather, be quick to repair it by repentance, although many others may commit a large number of faults, slight and grievous, and remain unrepentant.
You ought to make every effort to free yourselves even from venial sin, and to do what is most perfect.