If belief is necessary in order for the truth and reality to be known, then it does follow that knowledge of the truth and reality 'must come from belief', because without belief the truth and reality is unknowable.
Not analogous at all. You can exclude flour from a cake and still get a cake by using some other ingredients other than flour. So, flour isn't necessary to get a cake.
But if you can't have any knowledge of the truth and reality without belief, then knowledge of the truth and reality must come from belief. So, you can't exclude belief from knowledge and still get the truth or reality. The truth is the result of a believing mind, because it is only in and with believing mind that the truth and reality can comprehended.
You have “proven” no such thing. Do you even understand what the statement 'belief is necessary for knowledge' means?
Not only is belief a form of knowledge, but it is the ONLY form of knowledge that links us to the truth and reality.
No-one said it does.
But it does make “a microscope” 'a form of knowledge'.
But I can account for the fact that the truth, logic, consciousness, reality and “existence” itself is a form of knowledge that is only made possible in and through a believing mind and you can't account for anything.
So, if the truth and reality is the product of a believing mind, because the truth and reality isn't knowable anywhere else but a believing mind, then a believing mind is the only thing that can account for the truth and reality.