Deontological ethical theories claim that certain actions are right or wrong in themselves, regardless of what the consequence is. For example Natural Law. However Teleological ethical theories look at the consequence and result of an action to see if it is right or if it is wrong. For example Situation ethics. The difference between teleological and Deontological ethics is outcome of act verses the act itself. Teleological ethics denotes even if the act was wrong but the outcome turned out good then it is considered good. Deontological deals more with the intention of doing a good deed but may have had a bad result
Teleological moral systems are characterized primarily by a focus on the consequences which any action might have (for that reason, they are often referred to as consequentalist moral systems, and both terms are used here). Thus, in order to make correct moral choices, we have to have some understanding of what will result from our choices. When we make choices which result in the correct consequences, then we are acting morally; when we make choices which result in the incorrect consequences, then we are acting immorally. Deontological moral systems are characterized primarily by a focus upon adherence to independent moral rules or duties. Thus, in order to make the correct moral choices, we simply have to understand what our moral duties are and what correct rules exist which regulate those duties. When we follow our duty, we are behaving morally. When we fail to follow our duty, we are behaving immorally.
In natural law Aristotle stated that there is a universal natural law that our whole world should follow, and this law is determined by a supernatural power. Later in the 13th century Thomas Aquinas developed Aristotle's theory and said this supernatural power was God. This theory is an absolutist theory, and most absolutist theories are