I and Observation

I know, at least I think I know, that I did not exist before I was born.

I know, at least I think I know, that I will not exist after I die

I know, at least I think I know, that the matter made up me exiested before I was born

I know, at least I think I know, that the matter made up me will continues to exist after I die

I know, at least I think I know, that I am a part of the world within a certain time period

I know, at least I think I know, that the world contains me within a certain time period

I know, at least I think I know, that I am capable of observing the world

I know, at least I think I know, that I am capable of observing myself

I know, at least I think I know, that, when I observe, the world is disturbed

I know, at least I think I know, that, when I observe, I am disturbed

An observation is the world disturbing itself!!! How is this possible