Context

This gem from Sartre is central to the doctrine of existentialism.

It goes against an earlier school of thought in which "existence" was secondary to "essence." Before we go any further, let's define those two terms.

• Essence is the nature of something. The essence of water is wetness; the essence of triple layer chocolate cake is deliciousness. And like that, all things and people that exist do so in a certain manner. 
• Existence, in contrast, is just the fact that something is in the world, that it has matter in our physical realm.

So what's the big deal?

Well, Sartre wasn't as much concerned about water or chocolate cake; he was concerned about human beings.

Most religions teach that human beings were created by a higher power, which would mean that they have some purpose or essence innate in them. Sartre, on the other hand, wanted to prove that humans create their essence from their existence. If we think human essence includes consciousness or morality or body odor, it's only because we experience these things (while existing) and then attribute them to some fundamental idea we have of what it means to be human.

Where you've heard it

Um…in an introductory philosophy course?

We're not saying the quote isn't important; it's a pretty big deal as far as establishing a basis from which to explore our humanity. Having said that, you're probably not going to see it on a coffee mug anytime soon.

Which makes us wonder…what is the essence of coffee?

Pretentious Factor

If you were to drop this quote at a dinner party, would you get an in-unison "awww" or would everyone roll their eyes and never invite you back? Here it is, on a scale of 1-10.

So let's get this straight. You're quoting Sartre and wondering if you sound pretentious? Well, if existence truly does precede essence, that means pretentiousness is part of your essence.

Quoting philosophy is one thing, but quoting existentialism is quite another.