why there is a need to see in order to believe?

[Brian37]

Any athiest can answer the above

Ok, next time you fly on an airline make sure the piolot is a dog catcher with no training flying plains because we wouldn't want to have any level of safty standards now would we?

This is the flawed logic the user has. That is what you are mentally doing to yourself when you ask us sush a silly question.

People once believed the sun was a god and they "just believed".

Or better yet, since you don't need evidence for anything, can I be your primary doctor(I wont tell you I am not a doctor. just have faith I am).