"No one knows anything – and even that’s not certain. You
shouldn’t rely on what you believe to be true. You might be
mistaken. Everything can be questioned, everything doubted.
The best option, then, is to keep an open mind. Don’t commit,
and you won’t be disappointed. That was the main teaching of
Scepticism, a philosophy that was popular for several hundred
years in Ancient Greece and later in Rome. Unlike Plato and
Aristotle, the most extreme sceptics avoided holding firm opin-
ions on anything whatsoever. The Ancient Greek Pyrrho (c.
365–c. 270 bc) was the most famous and probably the most
extreme sceptic of all time. His life was decidedly odd."