God has taught me that I never need to worry about tomorrow. I survived yesterday.
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.