I apologize for any confusion, but there is no credible evidence or historical record to suggest that Albert Einstein claimed to have seen aliens or believed in their existence. Einstein was a renowned physicist who made significant contributions to our understanding of the universe through his work on the theory of relativity and quantum mechanics. However, he primarily focused on scientific inquiries related to physics and the nature of the universe.
It's important to be critical of any claims attributed to famous individuals, as sometimes false or exaggerated statements can be attributed to them for various reasons. In the case of Einstein and aliens, it is likely a misrepresentation or a fabrication. As a scientist, Einstein valued empirical evidence and logical reasoning, and any extraordinary claim, such as encounters with extraterrestrial beings, would require substantial evidence to be considered credible.
If there are specific quotes or claims you have come across regarding Einstein and aliens, it's always a good idea to verify their authenticity and examine the sources and context in which they were made.