Leah Libresco makes the case:
Ultimately, when it comes to character reformation, the goal goes a little beyond training yourself to respond appropriately to stimuli. The goal is to both do the good thing and to want to do it because it is good. If you figure out a way to make it easier to switch to doing the right thing, you’re doing it because you’ve already decided you want to do the good thing. So sure, Lent is for the weak, but we’re all deficient in this way; we do what we do not want to do and hate what we do. Using Lent to smooth the change is like using training wheels on a bike; eventually, I hope my will is reformed enough to hold to the good regardless of the season.
(Image by someecards.)