Is it possible to be happy?

Is it possible to be happy? Well that sounds pretty complicated. And there are a lot of people, companies and organizations telling you how hard it is - but it this really true? I don't think so. It's like a glass of water is it have full or half empty. The same is with happiness. It's a mindset. You can look arround and put your attention on negative and bad things or just find something nice. Just accept the things as they are. Find something you like and that's all.