Our character can be thought of as the result of a long process of engraving or scratching. I tend to see it as a solid metal shield full of scratches from long battles. The resulting grooves tend towards virtue or vice. A sustained habit of wise choices makes it easier to do the right thing - even when it is hard - when the time comes and it will come. A marriage, a deathbed, a career. Life has its fair share of hard choices and having grooves in your soul that guide your choices towards the virtuous helps immensely.
That's also useful to know for when you have unimportant tasks to complete. For some people this may comprise the majority of their career and/or life. However, those "unimportant" tasks still scratch your soul and those scratches ultimately matter. Even seemingly mundane things like taking out the garbage can be done with virtue in mind.
I'm fun at parties by the way.