Good morning is a common greeting in many languages, and when you say this to someone what you are really saying is that you hope their morning will be or has been good. This term is used until noon, and then the proper greeting would be good afternoon instead. Mornings can be rough for some people, especially if they must wake up very early in the a.m. When someone wishes you a good morning it improves your mood and makes your day better.
On this road called life, you have to take the good with the bad, smile when you're sad, love what you got, and remember what you had. Always forgive, but never forget. People change. Things go wrong. But just remember, the ride goes on.