|Source: Carl Sagan|
So I did a bit of research (i.e. a quick google search) and learned that the gist of the quote is from a series Carl Sagan did in the 1980s. Our bodies are primarily made up of the stuff that is in stars, so we are made of star stuff.
I love this. It makes me feel connected to the universe and part of everything. At the base of our existence, we have to let down our walls to know that we are not alone, we are loved, and we are so significant.