As the (almost) first post for this site, I want to start with feel good vibes. I'll collect inspirational science stuff here as I come across them.
I recently came across a brief essay by Martin Schwartz  as a part of a reading for class. The essay makes me feel a bit better about being stupid, and I suggest you check it for yourself. Favorite bit:
"Focusing on important questions puts us in the awkward position of being ignorant. One of the beautiful things about science is that it allows us to bumble along, getting it wrong time after time, and feel perfectly fine as long as we learn something each time."
 Schwartz, M. A. The importance of stupidity in scientific research. J. Cell Sci. 2008, 121, DOI: 10.1242/jcs.033340