This, to me, is one of the most revealing and sincere quotes that Phil has ever made. Whatever exactly Valis is, it does seem to work this way. It is also one of the many "saving graces" that I attribute to Phil that helped me during a very difficult time. The only con is that when something extraordinary occurs, Valis is always there peeking around the corner, and then tweeking to make a liar out of ya'. Oh well, what will be, Will Be.
Here it is:
"Therefore it can be reasoned that Valis will show as few times as possible, and, if he does reaveal himself to a person, Valis will becloud the situation so that the person cannot make the knowledge he has- hence the real situation- generally well known."