People say it a lot and from what I've seen so far it's all been true. They say life is beautiful, life is good, life is interesting and all. But have you come to sit and found out why they keep on saying that.
From what you would have noticed, the main reason they say it is cause they have tasted of the good things about life. It could be about the benefits. And it could be their belief that's making them happy.
You can only say life is beautiful when you know how to live through it. You can say that when you've made it to where you planned to. When you're satisfied with your result and good to keep going forward.
So make every effort towards you saying life is good. Cause that's the best thing you'd ever want to say. Not just hearing it from others and feeling happy for them. Let them feel happy for you too and say you're really doing good.
Saying Life is good at constant is like speaking faith and expecting it to manifest in your life. And, I'm sure it will since Faith is what moves and pleases God.