Never, because "You cant be right by doing wrong; you can't be wrong by doing right."

                                             -Thomas S. Monsond

This quote means that you could never feel good or not guilty when you have done something bad. You should always choose the right. Sometimes people do bad things just for the benefit for them. People are selfish and become cruel. But you could never do something negative and feel good about yourself because is wrong. An example of this quote would be stealing from your parents. Maybe you need money for something but stealing is not the way of getting it. Asking for money would be way better than stealing. If they don't give you money then you just have to understand and move on. But you should always choose the right so you feel good.

"If your so-called friends urge you to do anything you know to be wrong, you be the one to make a stand for right, even if you stand alone. Have the moral courage to be a light for others to follow." 
                                                -Thomas S. Monson

  This quote means that sometimes when your different from people is not always a bad thing. Different is sometimes good, it makes you stand out. Always chose the right. Say and do for what you stand for, your morals, your altitude as a person. Being different is good especially when you do something positive in a negative position. An example of this quote is when you go to a party and all your friends are peer pressuring you to drink, but you should have the courage to say no and maybe this action will help another person to say no too. Another example of this quote is when your friends are smoking, you know its wrong so you should say no. Always be the person that chooses the right. At the end the one who does good end up getting further in life, ends up being more successful. Choose the right.   

Obedience

"Obedience is the great test of life."
                             -Thomas S. Monson 

This quote means that when you choose the right and obey things your future will be brighter. Not only is it saying that it makes you a better person when you do the right thing but also it makes you a more honest person and with honesty answer and new experiences come along in your life. One example of someone not obeying is when you go out and get drunk and then a cop stops you because you disobey the rules of not drinking and driving and now you end up in jail for making the wrong choice.So go along with the rules obey them and you will have a great life.

                       "Decisions Determine Destiny"

This quote means that whatever decision you make that's what your destiny will be. For instance if you make a bad choice your destiny/future will turn out bad but if you choose the right your destiny/future will be positive and amazing.

An example of a positive decision is a person that is determine to pass a test so him/her studies hard for her test and passes it. This shows how her decision of passing the test help her because in her destiny that will help her and not hurt her.