Virtue as a path toward freedom
The practice of virtue is like learning to tie a shoe. At first, it is difficult, but after time and practice the muscle memory kicks in and it becomes easy. So, too, in the battle against vice. Aided by grace and practical prayerful resolutions, our flabby virtue muscles, once strengthened can help to overcome our struggle with concupiscence and form in us "The habitual and firm disposition to do the good," (CCC 1833) so that we are able to do the good with ease and also find pleasure in it.