Please watch this video. I'm not sure exactly why I like it so much, but I do. Richard Feynman (1918 - 1988) was an American physicist - probably the most famous one of the 20th century. I often like how he thinks about thinking.
https://www.youtube.com/watch?v=3D2RaDVkylY
And also this, because it is just so cool:
https://www.youtube.com/watch?v=oSCX78-8-q0
