Only two things are infinite, the universe and human stupidity, and I'm not sure about the former.
Theory of relativity
Attributed, but exact source and wording vary, often cited without definitive proof.
Undetermined
Found in 2 providers: grok,deepseek
Cross Reference
2 sources
"The definition of genius is taking the complex and making it simple."
Humorous"Marriage is the unsuccessful attempt to make something lasting out of an incident."
Controversial"The only reason for time is so that everything doesn't happen at once."
Strange & Unusual"The most beautiful thing we can experience is the mysterious. It is the source of all true art and all science. He to whom this emotion is a stranger, who can no longer pause to wonder and stand rapt …"
Strange & Unusual"The pursuit of truth and beauty is a sphere of activity in which we are permitted to remain children all our lives."
Humorous