"A casual stroll through the lunatic asylum shows that faith does not prove anything"

This quote by Friedrich Nietzsche is a commentary on the power of faith and its ability to provide proof for a specific belief. He is suggesting that faith alone is insufficient to show something, which a more comprehensive examination of the proof is necessary. He is indicating that a casual walk through the lunatic asylum, or a superficial assessment of the evidence, is insufficient to prove something. He is suggesting that faith is not a dependable source of proof which a more extensive assessment of the truths is essential. He is also indicating that faith can be a harmful thing, as it can lead to illogical beliefs and decisions. Ultimately, Nietzsche is suggesting that faith is not a reliable source of proof which a more comprehensive assessment of the facts is necessary in order to show something.