Hi @mariu.espinosa
There is saying that if we can't have discipline in our life then we can't succeed and as an exception if you succeed then you will not be able to survive for long because discipline is something that's necessary in our life each and every day.
Discipline is not a rule instead it's one of the skill that we all must make our habit on day to day life and once we adopt it then we can see the significant difference on the deliverables and meeting various deadline that we need to fulfill on time.
Nice post.