Writing Definition

Discipline
In its original sense, discipline is referred to systematic instruction given to disciples to train them as students in a craft or trade, or to follow a particular code of conduct or "order". Often, the phrase "to discipline" carries a negative connotation. This is because enforcement of order – that is, ensuring instructions are carried out – is often regulated through punishment.(http://en.wikipedia.org/wiki/Discipline)


 In addition, discipline is important to one person. Through discipline you can control yourself. If you think you are fat then you can have a diet. If you don't have self-discipline, you cannot control yourself or you cannot reach your goal. Discipline is also a training to us that corrects, molds, or perfects the moral character. It molds us to become a better person. Discipline can be seen in many things and it is needed to one's life.


Accountability
Accountability is the concept in ethics and governance with several meanings. It is often used synonymously with such concepts as responsibility, answerability, blameworthiness, liability, and other terms associated with the expectation of account-giving. As an aspect of governance, it has been central to discussions related to problems in the public sector, nonprofit and private (corporate) worlds. In leadership roles, accountability is the acknowledgment and assumption of responsibility for actions, products, decisions, and policies including the administration, governance, and implementation within the scope of the role or employment position and encompassing the obligation to report, explain and be answerable for resulting consequences.(http://en.wikipedia.org/wiki/Accountability)


 To put it another way, accountability is the responsibility of one person.  It is an obligation of an individual or organization to account for its activities, accept responsibility for them, and to disclose the results in a transparent manner. Every person has its own responsibility and you are obliged to do that. For me, as a student my responsibility is to study and to graduate. And I have other more responsibility than that like in our house and etc. and it also the obligation to bear the consequences for failure to perform as expected.


Maturity
Maturity is a psychological term used to indicate how a person responds to the circumstances or environment in an appropriate manner. This response is generally learned rather than instinctive, and is not determined by one's age. Maturity also encompasses being aware of the correct time and place to behave and knowing when to act appropriately, according to the situation and the culture of the society one lives in.(http://en.wikipedia.org/wiki/Maturity_(psychological)


 In other words, maturity refers to a full development of a person. It  is a state of mind and has nothing to do with age. Based on my experience, I have seen many grownups who think childishly and I've also seen many youngsters who think very old. Our age is not controlling us when we will get mature; it depends to the person who can cope with any form of change or alteration from the norm in life experiences.