But doubtless I did exist, if I persuaded myself of…
““But doubtless I did exist, if I persuaded myself of something. But there is some deceiver or other who is supremely powerful and supremely sly and who is always deliberately deceiving me. Then too there is no doubt that I exist, if he is deceiving me. And let him do his best at deception, he will never bring it about that I am nothing so long as I shall think that I am something. Thus, after everything has been most carefully weighed, it must finally be established that this pronouncement “I am, I exist” is necessarily true every time I utter it or conceive it in my mind.””
About This Quote
This interpretation was drafted with AI assistance. It is one reading of the quote, not the author's own explanation.
Existence is affirmed by the act of thinking, even if a deceiver tries to mislead.
In simple terms: Thinking proves you exist, despite doubt.
Key Takeaway
Trust your own reasoning.
Themes
philosophy
knowledge
skepticism
Mood
contemplative
inquisitive
Type
philosophical
inspirational
When to use this quote
- personal reflection
- ethical dilemmas
- critical thinking
- spiritual inquiry
Key Concepts
cogito ergo sum
mind-body problem
Questions to Reflect On
- Can you be certain of any truth beyond your thoughts?
- What does it mean to be deceived about existence?
A Different Perspective
The argument assumes a reliable self‑concept, which may be unstable.