Thoughtful Thursday: What's your favorite quote?

Every Thursday this summer, we'll have a tweet that asks you to respond with your thoughts and comments. This week the question revolved around your favorite quote and who said it (and if you want to tell us why, that's great too!). We got a few responses, but feel free to keep adding in the comments below!

• @richbcs: "All of us are in the gutter, but some of us are looking at the stars." -Oscar Wilde
• @karlphipps: "Nothing in the world is more dangerous than sincere ignorance and conscientious stupidity." -Martin Luther King, Jr.
• @karalemar: "Education is not the filling of a pail, but the lighting of a fire." -W.B. Yeats

You can read more favorite quotes from members here. And don't forget to follow us on Twitter (@STLE_Tribology) or like us on Facebook.