Every one of them says “how are you?” And you always have to say “good,” even if you’re not good.
If you say things aren’t good, they’ll wonder — aloud — why you’re placing “limits” on yourself or the situation. All things are possible through God and enough prayer.
This does not stop when you grow up.
This does not stop when you leave Christian Science.
This does not stop when they know you’ve left Christian Science — this is just proof you need Christian Science more than ever before! Because logical fallacies!
So you lie and say it is “good” even when it’s not, and it becomes a habit. Everything is good.
Everything is always good*.
*Except when it isn’t, and it all blows up in your face. Then it is your fault for not trusting God enough and not reading the Lesson, and failing to pray and have the proper understanding.
kind-ism 
The constant threat of terrorism may break the habit of saying “Everything is good.”
I’m going to disagree about the “constant threat of terrorism” and leave it at that. In 2015 in the US, toddlers with guns killed more people than terrorists. Terrorism is not a threat, stupid people are.
http://www.snopes.com/toddlers-killed-americans-terrorists/
All is well. All is well. All is well. All is well. All is weeAAAARGH!