Faith is just another word for brainwashing. You can have faith that Unicorns in spaceships are going to bring you a tuna sandwich. But it's never ever ever going to happen. Faith is worthless.
And faith in atheism or the nonexistence of a supreme being.
To deny the possibility means that one has to admit that nothing exists beyond our perceptions of the world. What we see, hear, smell, taste and feel is completely different than the actual reality that exists.