Bertrand Russell was a British philosopher, logician, mathematician, historian, writer, social critic, political activist and Nobel laureate. Here are some of his quotes:

- "The good life is one inspired by love and guided by knowledge."
- "The whole problem with the world is that fools and fanatics are always so certain of themselves, and wiser people so full of doubts."
- "The trouble with the world is that the stupid are cocksure and the intelligent are full of doubt."
- "In all affairs it's a healthy thing now and then to hang a question mark on the things you have long taken for granted."
- "The fact that an opinion has been widely held is no evidence whatever that it is not utterly absurd."
- "To be able to concentrate for a considerable time is essential to difficult achievement."
- "The greatest challenge to any thinker is stating the problem in a way that will allow a solution."
- "The good life is one inspired by love and guided by knowledge."

I hope this helps!.