As Yogi Berra said, “In theory there is no difference between theory and practice; in practice there is.

In theory there’s no difference between theory and practice. But, in practice, there is. — BENJAMIN BREWSTER, EPISCOPAL BISHOP

[I]n academia there is no difference between academia and the real world; in the real world, there is.

Because practice is subjective, theory which is always the theory of an object, can't access to the reality of this practice, what it is in itself, but only represent it, in such a way that this representation lets out of itself the real being of practice, the effectivity of the doing. Theory does nothing.

In conclusion, a word about your tired expression that there is a difference between theory and praxis. ... Thereby you want to say that praxis should be as unencumbered as possible by theory. Coming from you, this wish is quite intelligible. What you mean by praxis is private profit; what I mean by theory is justice.

Parce que la pratique est subjective, la théorie qui est toujours la théorie d’un objet, ne peut atteindre la réalité de cette pratique, ce qu’elle est en elle-même, sa subjectivité précisément, mais seulement se la représenter, de telle manière que cette représentation laisse hors d’elle l’être réel de la pratique, l’effectivité du faire. La théorie ne fait rien.

: I only said there's no difference between what the two do. I want everybody to know that.

In academia, there is no difference between academia & the real world. In the real world, there is. (inspired by Yogi Berra)

There's literally no difference between a physician recognizing a disease from a "facial expression", and a little child pointing to something and saying "doggie".

La teoria è quando si sa tutto e niente funziona. La pratica è quando tutto funziona e nessuno sa il perché. Noi abbiamo messo insieme la teoria e la pratica: non c'è niente che funzioni... e nessuno sa il perché!

There's no difference between the conquering of the unknown and the creation of habitable order.

Theorie und Praxis sind Eins wie Seele und Leib, und wie Seele und Leib liegen sie großenteils mit einander in Streit.

Where conscious subjectivity is concerned, there is no distinction between the observation and the thing observed.

A business man once stated that there is nothing so practical as a good theory.