Everyone claims to be okay with freedom of religion, but the moment you mention God there is a strange tension that fills the air. If there was a 6th sense, that would be it.

— Criss Jami

For God to prove himself on demand, physically, would be a grave disappointment, and the strongest Christians should be considerably grateful that he chooses not to do so. The skeptic endlessly demands proof, yet God refuses to insult the true intelligence of man, the '6th sense', the chief quality, the acumen which distinguishes man from the rest of creation, faith.

— Criss Jami

If there really is a definable 6th sense, it would be the natural connection and the ability of communication between man and animal

— Justin Southwick