“The awareness of our own strength makes us modest.”

Think how hard physics would be if particles could think.

I sing the song of equality, where all barriers and differences have melted into one.

Wit lies in recognizing the resemblance among things which differ and the difference between things which are alike.

Experience is the teacher of all things.

You teach best what you most need to learn.

Don't talk about what you have done or what you are going to do.

If the stars should appear but one night every thousand years how man would marvel and adore.