You are not angry when you don't get what you want, because your wanting it was simply a preference, not a necessity. You therefore have no fear associated with the possibility of not getting it. Hence, no anger. You are not angry when you see others doing what you don't want them to do, because you don't need them to do or not do any particular thing. Hence, no anger. You are not angry when someone is unkind, because you have no need for them to be kind. You have no anger when someone is unloving, because you have no need for them to love you. You have no anger when someone is cruel, or hurtful, or seeks to damage you, for you have no need for them to behave any other way, and you are clear that you cannot be damaged. You do not even have anger should someone seek to take your life, because you do not fear death.