Is there nothing in all this which is as true as it is certain that I exist, even though I should always sleep and though he who has given me being employed all his ingenuity in deceiving me?

• 即使我总是要睡觉，即使那个使我得以存在的人竭尽其能欺骗我，但我确实存在着，这一切同样也真实的。 难道这些全是虚无的吗?