It has been mentioned many times that Chris's mind is like that of a child. It is no different here.
Like many children, he maintains belief in things that seem strange to anyone who has grown past that stage of life. Things like his "curses" and other odd beliefs might be related to this lack of development. He sees or hears about things happening, but can't separate these events from his own sense of self, therefore he thinks that at some level, he has caused them.
There is a situation in early childhood where egocentrism and objective relativity have to balance each other out. A child only has one frame of reference, himself, and relates everything to his point of view. Things he does not understand he will try to deduce, but due to being uninformed, the child will create explanations based on his own experience, which can often revolve around "magical" thoughts, and the idea that things happen "just because," rather than because of a particular reason.
A young child has not yet developed the facilities to understand that points of view can be different based on the perceptions of others, and that sometimes the answer to a problem may lie with the knowledge of someone other than himself, even if he cannot yet comprehend a solution. Instead, in this early stage of development, the child relies on his own perceptions to the exclusion of others.
Reliance on uniformed, childhood perceptions of the world is related to the individual's tendency to think intuitively or, in other words, subconsciously. These perceptions tend to go away with experience and education.
Chris seems to have issues with this stage of his development, and it is evident in many of the childish concepts he has kept well into adulthood.
For example, it is common for children, especially first born or only children, to have "imaginary friends," which are often given supernatural qualities -- like the ability to possess toys, drawings, or empty spaces, and influence the world around them. The child often projects issues in his life on the friend. A child with a fear of the dark may project that insecurity onto the friend as a coping mechanism, or as a way to avoid something they don't like.
As a child becomes more social and educated, these delusions usually go away. But Chris never seems to have left this stage of development.
TLDR: Chris is a 33-year-old 6-year-old. And kids in that age range tend to believe a lot of crazy stuff, not for any spiritual reason, but because they don't know any better.
Edit: For great just..er... grammar!
