Why Belief is Fundamental

Everything you know is what you believed. One would say that they only believe what is true , because they would say that not everything is true, so must only believe what is true. Still what you say is true is simply put what you believed by choice alone, because you chose to believe it and not another part because you didn't like it. If this is so , then I ask you this, how do you know what is true and not true if all you say is true is what you randomly chose was true. Clearly you say some is false , but you don't know if your own beliefs are false. Therefore , it is best to believe all of it , since that way you know what is true which is what you believe, further you know clearer what is true and false since you believed more of what you saw which would hopefully be it and more. This also allows you to compare what you know far easier since you know more since you remembered more since you believed it. This is why one should have belief and faith in another, themselves and God. Since obviously , if what you believe is true and what another believes is true then both must be partially true.