Progress is impossible without change, and those who cannot change their minds, can't change anything.

We should not be surprised that children are better observers than grown-up people.

Look deep into nature, and then you will understand everything better.

Innovation distinguishes between a leader and a follower.

Read yourself, not books. Truth isn't outside.

I’ve learned that people will forget what you said, people will forget what you did, but people will never forget how you made them feel.

Cast down your bucket where you are.