"To do is to be" quote

There’s an old jokethat returns about 134 million hits on Google.

“To do is to be” - Nietzsche.
“To be is to do” - Kant.
“Do be do be do” - Sinatra.

The first two phrases are attributed to various other philosophers, including Socrates, Plato and Sartre.

Are they in fact genuine quotes at all? If so, who said them, and what do they mean?

Here’s an article from Quote Investigator.

After tracing it through many variations, their final conclusion was:

I recall seeing it in a bathroom in my college dorm sometime between 1970 and 1972.

Thanks for that.

The version from the Unix fortune file is:

To be or not to be
– Hamlet
To be is to do
– Hegel
To do is to be
– Marx
Do be do be do
– Sinatra

I remember seeing this in the late 70s.

Leo-tzu must’ve been Lao-tzu’s younger brother…

Tao

I’ve always heard the third line as:

“Yabba Dabba Do” - Fred Flintstone.