Dicipline can be best defined as the ability to do something because you need to it and doing it properly.
We could be disciplined with work, with spending money example depriving ourselves of comfort because of the needful and other important things. When we focus on our needs not our want we get far beyond the expected with speed and a better outcome.
Discipline gives room for positive changes and this can also be known as grace. The ability to do what is needful and stick to it. May God give us the grace to be disciplined in all areas of our life.