My father was more of the paranoid type, and as a result, I started out that way too. But I found it is very much a decision you can consciously make, to not ignore negative things you expect to happen, but much rather focus on the good things that could happen instead.
So let's not talk about gravity, as it makes the world around us feel very grave, but instead focus on attraction, which is a more general concept, that can be applied to human emotions and thoughts, which are to most of us much more important than the fact that mass is said to keep us stuck to the Earth like flies.